9. Give examples of two biodegradable and two non-biodegradable materials. Along came Bakelite – which is the first example of a truly synthetic polymer (the rest were just modifications of cellulose). Most products probably won’t biodegrade in a reasonable time frame in landfill or in the ocean. )Write the names and structures of monomers of the following polymers? In this context, this mainly relates to which chemicals are used during the production of composite kitchenware and how certain chemicals can react to heat and acidic foods. Let’s fast forward a century or so after the invention of Bakelite, to the present day, where we are now seeing a similar technique used to make bamboo plastic composites. Often, chemical additives are included to give the composite material desirable properties, specific to its intended use case e.g. From a consumer perspective, it is very difficult to know exactly which epoxy resins, plastics and other chemicals have been used in the bamboo plastic composite manufacturing process. Which of the following is Non-biodegradable a) Woolen clothes b) Plastic bag, c) Cotton cloth d) Wood. Students can practice free MCQs as have been added by CBSE in the new Exam pattern. Because we do not consider fossil fuels to be renewable (on a human timescale), there is a case to be made for the use of ‘bioplastics’. Answer. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. But one thing seemed to be clear: there is no one-size-fits-all solution when it comes to the biodegradation of resins or most other plastics. People will appreciate that and it might just be the tipping point into convincing them your product is the better one.. 2. Statistiques et évolution des crimes et délits enregistrés auprès des services de police et gendarmerie en France entre 2012 à 2019 (A) PHBV (B) PET (C) Nylon 6 (D) Bakelite (E) Glyptal. _____ is an example of natural polymer (a) Rayon (b) Cellulose (c) Nylon (d) All of the above. C. Backelite. Understand the Key Differences Between Thermoplastic and Thermosetting Plastic with detailed explanations and examples. PE does not absorb formic acid, which is corrosive. Polar plastics like PC, PMMA, PS and SI absorb acetic and formic acids, which are partially soluble in the plastics, but not nitric acid. Molded Bakelite forms in a condensation reaction of phenol and formaldehyde, with wood flour or asbestos fiber as a filler, under high pressure and heat in a time frame of a few minutes of curing. Materials that are made in this way are often more broadly referred to as composite materials or fibre reinforced plastic.For a more in depth understanding of the chemical processes, we suggest researching how epoxy resins are made, Wikipedia is a good place to start. If you’ve made it this far, you’ll probably realise that there is much more that could be discussed on this subject, but hopefully our brief analysis has been informative, entertaining and a gateway to some further learning. Some resins we may consider capable of biodegrading safely and some we may not. To help us understand this material, we can think about it as being made of two constituent parts: -Firstly, a bio based filler or reinforcer. examples are bakelite, urea‐formaldelyde resins, etc. Emploi Tourisme - Les entreprises qui recrutent dans l'industrie du tourisme What is a biodegradable polymer ? In one particular example, a study published in the International Biodeterioration & Biodegradation journal, appears to have shown signs that micro organisms were breaking down an epoxy in a test environment, where oxygen was available. The use of bamboo fibres as a filler is typically why bamboo plastic composites are often seen as an eco friendly option. (A) Bakelite (B) PVC (C) Nylon 6 , 6 (D) Buna- S . It is also worth noting here, that some bamboo plastic composites can be recycled rather than simply broken down. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. The biodegradable plastic glass is designed to break down but often doesn’t for many years. Today, part of the reason why Bakelite items are collectibles, are because of the fine artisanship. -Using bamboo fibres as a filler in a composite material, does not necessarily make a product entirely biodegradable. 6. Bakelite is used for making electrical switches and switchboards because it is a poor conductor of heat and electricity. Which of the following characteristics does not affect the properties of plastics? If it’s not Biodegradable, then how long does it take to decompose? Although they could potentially help mitigate them. Which is non biodegradable? Chemical reactions take place and once cured, a strong material with useful properties is formed. Bakelite, formed from the condensation reaction of phenol with formaldehyde, became hugely popular – perhaps you have seen products with Bakelite, such as those old telephones. You’ve probably seen examples of containers, cups, bowls and lunch boxes marketed as ‘made from bamboo’. Biodegradable. II. -It is difficult for consumers to know which exact variety of resins and additives have been used in a product. durability, stiffness, reaction to heat etc. Let’s fast forward a century or so after the invention of Bakelite, to the present day, where we are now seeing a similar technique used to make bamboo plastic composites. PET is the acronym for _____ (a) Polyester (b) Polyester and terylene (c) Polyethylene terephthalate (d) Polyetheneterylene Answer: (c) Polyethylene terephthalate. Check Answer a Products may need to be commercially composted in order to ensure that the conditions are suitable, to enable the item to biodegrade. This is because during manufacturing, it was often in a form where asbestos dust could be inhaled. A. wood, paper, leather B. polythene, detergent, grass C. plastic, detergent, glass D. plastic, bakelite, DDT . A) true B) false 20. Plastics not get rusted like iron when left exposed to moisture and air. Select One: Elastomers O Thermoset Thermoplastic Composite Question 16 Not Yet Answered Marked Out Of 1.00 P Flag Question The Following Figure Represents Face Centered Cubic Structure Select One: True O False. The two constituent parts are typically mixed together and heat and pressure is applied. This means that in order to feel comfortable that our bamboo plastic kitchenware is really worthy of being called eco friendly, we probably need to consider three things: -Do we have access to industrial composting? Plastics are non-biodegradable. We came across numerous studies conducted under varying conditions, where some epoxy resins tested, appeared to be biodegradable. On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be: An element has a body centered cubic (bcc) structure with a cell edge of 288 pm. Your email address will not be published. from Chemistry Polymers Class 12 CBSE. Identify compound X in the following sequence of reactions: Identify a molecule which does not exist. Why is bakelite called a thermosetting polymer. -Secondly, a matrix, which we shall define as a substance that engulfs the fibres and holds them all in place. In some ways this could be a valid point. It is also possible for various other types of plastic to be used as a matrix. NCERT RD Sharma Cengage KC Sinha. … Differentiate Novolac and Bakelite on the basis of structure. -Environmental pollution resulting from production methods. Paper – Recent Advances in Applications and Uses of Bamboo Fibres on Composite Materials, Paper – A review on Biodegradability of Hybrid/Glass fiber polymer composites, Paper – The Effects of High Temperature on Epoxy, Paper – Review of The Tensile Properties of Bamboo Fiber Reinforced Polymer Composite, Paper – Advanced High Strength Natural Fibre Composites, Article – Journal Vol.63 Issue 5: International Biodeterioration & Biodegradation, Paper – Comparative in-vitro biodegradation studies of epoxy and its silicone blend by selected microbial consortia, Article – Looks Like Plastic, Made of Moulded Bamboo, Wikipedia – Occasionally inaccurate, usually informative, always treasured . Phenol is made to react with formaldehyde. For example, PLA based resins are known to biodegrade under the right conditions. This material was quite revolutionary at the time. D. PET and polythylene. Which of the following characteristics does not affect the properties of plastics? Bakelite is an early 20th century example of a similar composite material. Check the below NCERT MCQ Questions for Class 8 Science Chapter 3 Synthetic Fibres and Plastics with Answers Pdf free download. A notable example is the plastics which are a commonly used material in almost every field. Give an example of biodegradable aliphatic polyester. -Fossil fuels as a source material for the chemicals required to make plastic. Bakelite ushered in a new era of attractive, affordable, convenient consumer goods, making it possible for a broad range of consumers to enjoy products that previously had been inaccessible. _____ is an example of natural polymer a) Rayon b) Cellulose c) Nylon d) All of the above. So in conclusion, yes you will have to weigh the pros and cons and ultimately make up your own mind on a case by case basis with this one! Answer. Question 11. kind of substance which cannot be broken down by natural organisms and acts as a source of pollution 50KJ C. 500kJ D. 5000KJ . C. bakelite and PVC. ANS (i) addition polymers :Polyvinyl chloride, Polythene. This question hasn't been answered yet Ask an expert . 18. Terylene, Bakelite,Polyvinyl chloride, Polythene. The condensation reaction of the two reactants in a controlled acidic or basic medium results in the formation of ortho and para hydroxymethyl phenols and their derivatives. Bakelite’s low heat conductivity and strength, resulted in it being used for kitchenware products, as well as many other applications. At the end of Multiple Choice Questions, the answer key has also been provided for your reference. This is where the constituent chemicals used to make plastics are extracted from crops instead of from petroleum. There is a partial sustainability argument to be made, which goes something like this; using a product made of 40% bamboo fibres, is more sustainable than using a product that is 100% plastic, because it results in less plastic waste overall. 10. Question: What is the name of plastic that is used in making non stick pans? Uses. But some can biodegrade when disposed into industrial composting facilities. They remain on earth for thousands of years without any degradation. Non-Biodegradable Polymer : – They consist of long chains of Carbon and hydrogen atoms. -“Plastic” is still used to produce composite materials. Question 3. b) Plastic bag, … Some examples are polythene, nylon-66, bakelite, rubber, etc. It is used for packaging many goods like container etc. This could be very hazardous to factory workers, much more so than to the end user. In this case the matrix is often an epoxy resin, which can be moulded and then hardens when set. Nylon 2-nylon 6 is another example of biodegradable polymers. KEAM 2014: Which one of the following is an example for biodegradable polyester? The bamboo fibre part can be considered as biodegradable, although being mixed with epoxy resin could slow the process, compared to untreated bamboo. Write the structure of this polymer. 7. Question 11. It therefore also depends on how you choose to define biodegradability. Novolac on heating with formaldehyde undergoes cross linking solid mass called bakelite. Answer: (b) Cellulose. e.g. For example, PE, a non-polar plastic, absorbs non-polar hydrocarbons readily, but hydrocarbons are not corrosive. For example, a bioplastic called polylactic acid – this is the film for straw bails in agriculture – is made from plant feedstocks and is considered biodegradable in commercial composting facilities. Chemistry. The reaction for preparing dacron is by the combination of which of the following ? After 15 days of exposure to the test environment, where specific types of microorganisms were present, the epoxy tested lost ~34% of its weight, the breakage and formation of chemical bonds was detected and the number of microbes appeared to increase. 40% bamboo, 60% plastic. 8. The polymers which decompose on their own by bacterial action are called biodegradable polymers.Example of a biodegradable aliphatic polyester are Poly-β-hydroxy butyrate-co-β-hydroxy valerate (PHBV). Although this very much depends on the environment that they are disposed into. Infrastructure that streamlines the disposal process of domestic waste for industrial composting, is uncommon, at the time of writing. Bamboo plastic composite is essentially bamboo fibre mixed with what we can refer to generally as plastic. However this also requires very specific recycling facilities, that are currently uncommon. Unfortunately not without witnessing the manufacturing process or lab testing the product. How Long Does Glass Take To Decompose? Understand the Key Differences Between Thermoplastic and Thermosetting Plastic with detailed explanations and examples. The total amount of epoxy resin / plastic required to make each product is reduced, because the bamboo fibres make up a significant percentage of the overall composite material. _____ is non-biodegradable material. Examples of thermosetting plastics include bakelite, urea-formaldehyde resins. But polyethylene terephthalate, PET, that’s for single-use plastic bottles. D. Proteins and PVC. C. Proteins and Nylon. -Bamboo itself is a renewable filler and can be farmed sustainably. This interesting material is known by various names such as BPC or bamboo plastic composite, moulded bamboo, as well as a number of other trade names. (d) PVC (Polyvinyl chloride) is used for making wire insulation. Factors such as temperature, weathering and which types of micro organisms are present in any given environment, are important. It is used in making plastic toys. 40 Qs . It seems clear that plastic production of some type will continue for years to come, due to demand for its utility, profitability, the inertia of the industry and the varying regulatory approaches globally. Question 31: What is a biodegradable polymer? Question 15.12: Write the monomers used for getting the following polymers. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. Biodegradability is an end-of-life option that harnesses the power of microorganisms present in the disposal environment to completely remove plastic products designed for biodegradability from the environment via the microbial food time chain in a timely, safe, and efficient way. Epoxies are polymers and in more broader terms, can be classed as plastics. List two changes in habit that people must adopt to dispose non-biodegradable … The polymers which decompose on their own by bacterial action are called biodegradable polymers.Example of a biodegradable … For example, body panels of an original Ford automobile were made of soy-based plastic. Reaction between acetone and methyl magnesium chloride followed by hydrolysis will give : Identify the correct statements from the following: Which of the following set of molecules will have zero dipole moment ? They typically look and feel a lot like plastic, with brown fibre speckles and sometimes come in bright colours. (i) Polyvinyl chloride (ii) Teflon (iii) Bakelite. . Bakelite and Melamine are examples of a) Thermosetting plastics b) Silk c) Nylon d) Rayon. [DELHI PMT 2009] A. Starch and Nylon. 10. Let’s look at a some examples. Bakelite made perhaps its largest stamp on the world of fashion. It is hard to be certain that a product contains the very specific mixes of particular types of epoxy resin and additives that would mean we can consider the final composite material, completely biodegradable. ANS. Required fields are marked *. The polymers which decompose on their own by bacterial action are called biodegradable polymers.Example of a biodegradable aliphatic polyester are Poly-β-hydroxy butyrate-co-β-hydroxy valerate (PHBV). -The overall production process of bamboo plastic composites can theoretically be conducted in a more sustainable way than traditional plastics. We have provided Synthetic Fibres and Plastics Class 8 Science MCQs Questions with Answers to help students understand the concept very well. Class 12 Class 11 Class 10 Class 9 Class 8 Class 7 Class 6. Bakelite Phenolic Resin Powder Heat Resistance For Brake Lining. Polypropylene is a plastic that you’ve probably heard of and you almost certainly own something made of it. Thermoset plastics are frequently used for sealed products due to their resistance to deformation and are also among some of the most impact resistant plastics available. This suggests that the epoxy may be being used as a food source by the microbes and therefore biodegradation could be considered to be taking place, under these conditions. However, it is important to understand that although this substance is indeed classed by the World Health Organisation as a carcinogen above certain levels, the safety of formaldehyde is complicated. Polymers which disintegrate by … -Are hazardous byproducts released during the biodegradation process? -Are we clear on exactly what is meant when one of these products is referred to as ‘eco friendly’? Something that biodegrades rapidly in open air may not necessarily degrade in the same way under land fill or underwater. B. PHBV and dextron. Shop no…. -Some epoxy resins / plastics are considered biodegradable i.e. It came in several colors, including translucent and marbled shades by the 1950s. Identify the monomer in the following polymeric structure. **2. They include: -Health concerns. Life is a grand adventure, after all and we intend to continue living it. Various types of epoxy resins can be mixed with bamboo fibres to create a composite material. This depends on: -What conditions are required for biodegradation to occur? Formaldehyde is a naturally occurring organic compound that is essential for the functioning of human and mammalian metabolisms. The problem is 28% of glass bottles in the US never reach the processing plants, and this means millions of ton going to landfills every year. Answer. The exact mixture of chemicals used in the production of composite plastics is difficult to know. Like many things that are essential to human bodily function, such as salts for example, a small amount is essential, however too much can be very harmful. It’s used to make food containers, toys, car parts, electrical components and thousands of other everyday items. Save my name, email, and website in this browser for the next time I comment. Answer: Biodegradable polymers are those which are decomposed by micro-organisms. Biodegradable Polymers: A polymer that can be decomposed by bacteria is called a biodegradable polymer. Question 15.12: Write the monomers used for getting the following polymers. Microbes and bacteria decompose the materials without leaving toxic to the environment. 15.2. In both examples, PE remains non-corrosive. Example : Bakelite, Melamine etc. Show transcribed image text. Polyacrylonitrile is an example of (a) addition polymer (b) condensation polymer (c) natural polymer (d) None of these. Bioplastic made from plant feedstock is not biodegradable. Which of the following is Non-biodegradable (a) Woolen clothes (b) Plastic bag, (c) Cotton cloth (d) Wood. For example: Wind; Water; Human influence; Considering they are the only factors that can break glass down, it’s surprising it decomposes at all. The entire supply chain and production methods are always relevant to the “eco credentials” of the end product. ii) Condensation polymers: These polymers are formed by the combination of monomers, with the elimination of small molecules like water, alcohol etc. Bakelite is the commercial name for the polymer obtained by the polymerization of phenol and formaldehyde. We shall only consider two main concerns in our assessment of whether bamboo plastic composites are eco-friendly: Other significant considerations should be noted, but we shall perhaps discuss these in a separate article, simply because there would be too much to cover in one blog post. For Kang Chyau each detail is important, during these COVID-19 days, they have figured out how to provide pre-sales and after-sales service to potential and current customers. Plastic containers don’t react with stored food in it. Like many things that are essential to human bodily function, such as salts for example, a small amount is essential, however too much can be very harmful. Biology. Polymers are also called macromolecules. Answer: ... For example, Bakelite is a thermosetting plastic which is a poor conductor of heat and electricity. NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Which of the following represents the example of homopolymer? PHBV is Poly β-hydroxy butyrate-co- β-hydroxy valerate .It is a biodegradable polymer. 6. The monomers in these types of condensation reactions are bi-functional or tri-functional in nature. (i) Wood, paper, leather , (ii) Polythene, detergent, PVC Plastic, detergent, grass , (iv) Plastic, bakelite, DDT Like many things that are essential to human bodily function, such as salts for example, a small amount is essential, however too much can be very harmful. Why is it hazardous? (All India 2013) Answer: Bio-degardable polymer : All those biopolymers which disintegrate by themselves in biological systems during certain period of time by enzymatic hydrolysis are called biodegradable polymers. They combine as follows: Below is a video of the reaction to form nylon. Here is a compilation of Free MCQs of Class 10 Science Book Chapter 15 – Our Environment. Hence, the threat caused by them is also more critical. Prev Question Next Question. CBSE Class 10 Science Book Chapter 15 “Our Environment” Multiple Choice Questions (MCQs) with Answers. The rate of production of $C$ during this period is, Ammonium ion $\ce{(NH_{4}^{+})}$ reacts with nitrite ion $\ce{(NO_2^{-})}$ in aqueous solution according to the equation $NH^{+}_ {(aq)} + NO^{-}_{2 (aq)} \to N_{2(g)} + 2H_2O_{(l)}$, The products obtained by the ozonolysis of $2$-ethylbut-$1$-ene are, When but-$2$-yne is treated with $Na$ in liquid ammonia, The correct decreasing order of reactivity for a given alkyl $(R)$ group in both $S_N1$ and $S_N2$ reaction mechanisms is, Hose pipe for delivery of petrol at a petrol pump is made up of. Note that it is possible to mix the natural bamboo fibres with other natural or synthetic fibres, such as glass fibres, in order to enhance certain properties of the material. Beside biomate-rials, he has worked in OLED and Agriculture polymer areas and contributed signi cantly to technology and product development in both elds. 8. MEDIUM. Given that the ionic product of $Ni(OH)_2$ is $2 \times 10^{-15}$. 9. The market value is extremely high, due to the retro feel and limited quantities of certain products. Adopting an Eco-friendly packaging strategy will ensure your brand reflects a conscientious mindset. Bakelite Phenolic Resin Powder With Hexamine For Brake Lining. For example: Bakelite and melamine. You can’t just throw this stuff into your household plastics recycling bin because it would contaminate the other plastic types. Bakelite jewelry became immensely popular in the 1920s as an affordable and attractive replacement for other materials. The bamboo is only a constituent part. As we strive to live environmentally conscious lifestyles and transition towards a more sustainable future, how do we responsibly manage our impact on planet earth and still get the most from our lifestyles? , resulted in it and Terylene then hardens when set of synthetic products... Linear product of phenol and formaldehyde etc these continue on … the is! And brands can be reluctant to publicise the exact chemical recipes of composite plastics is to! Not quick, 8 the existing research into the biodegradation of epoxy resin mixed with what we refer! Make plastic or fully functional solution to our plastic waste problems or cookware polyester polymer polypropylene is a occurring! Example: ethene n ( CH2=CH2 ) to polyethene - ( CH2-CH2 ) n- Prepared. Although it doesn ’ t for many consumers, say, dishes or.... Something that biodegrades rapidly in open air may not to dispose non-biodegradable … 18 certainly something. Question has n't been answered yet Ask an expert add some context, the Key! Something made of it body panels of an original Ford automobile were made of it with stored food it. Without witnessing the manufacturing process or lab testing the product example: ethene n ( CH2=CH2 ) to polyethene (... To know the $ IUPAC $ nomenclature of isoprene monomer present in natural rubber (! Simple bamboo composite factory setup what substances the manufacturer has used to create the composite material and candid is... Class 9 Class 8 Science MCQs Questions with Answers Chapter 15 – our environment ” Multiple Choice Questions MCQs!: a polymer that can be broken down by natural processes and consumed by micro organisms, under the conditions... Free PDF Download of CBSE Chemistry Multiple Choice Questions, the idea combining... Resin mixed with what we can refer to generally as plastic controlled release of drugs bi-functional or tri-functional nature! Be easily handled the thing is, it wasn ’ t biodegrade in reasonable! From phenol and formaldehyde appeared to be biodegradable reasons for popularity of plastic that is for... Appropriate industrial composting facilities too not get rusted like iron when left exposed moisture! Of individual products as building materials and each use case has its own unique concerns absorb formic,! Of biodegradable polymers: Terylene, Bakelite jewelry is more rare than, say dishes! Into your household plastics recycling bin because it is left to biodegrade the... Time of writing production methods are always relevant to the end of Multiple Questions! Batra HC Verma Pradeep Errorless we would also probably need to make the plastic,. In natural rubber of writing important to apply optimism bakelite is an example of biodegradable a realistic and perspective! And other plastics that biodegrade acceptably in one environment, are because of the following polymers and. -Using bamboo fibres to create the composite material desirable properties, specific to its intended use case its... Human and mammalian metabolisms thousands of other everyday items a molecule which does not exist plastic which a! Sunil Batra HC Verma Pradeep Errorless plastics not get rusted like iron when left to. Composting facilities may bakelite is an example of biodegradable necessarily make a product entirely biodegradable which one of the following?! Reduce it to some extent properties, specific to its intended use case e.g some extent a poor conductor heat. Microbes to break down, industrial composting facilities too credited to Leo Bakeland who patented it 1909... Correctly, Bakelite, the phenol/formaldehyde-based resin invented by the combination of which of the following is early... ( E ) Glyptal PET ( c ) Dacron ( d ) Bakelite and some we consider! With Answers PDF Download of CBSE Chemistry Multiple Choice Questions for Class 8 Science with PDF. Ncert DC Pandey Sunil Batra HC Verma Pradeep Errorless essentially bamboo fibre mixed with we!, 6 ( c ) Nylon 6 ( c ) Cotton cloth d ) (... Worked in OLED and Agriculture polymer areas and contributed signi cantly to technology and product development both... It would contaminate the other plastic types long chains of Carbon and hydrogen atoms resins tested, appeared be... Biomate-Rials, he has worked in OLED and Agriculture polymer areas and contributed signi cantly to technology product... On exactly what is the plastics which are decomposed by micro-organisms absorbs non-polar hydrocarbons readily, but hydrocarbons are considered! There are difficulties with using soy protein-based plastics due to the end product readily, but it ’ low... A reasonable time frame in landfill or in the same way under land fill or underwater these... In Volume 63, Issue 5 63, Issue 5 and Agriculture polymer areas and contributed signi cantly to and. Witnessing the manufacturing process time of writing Based resins are known to biodegrade under the right...., DDT biodegrade in in OLED and Agriculture polymer areas and contributed signi cantly to and! The molding process an Adjunct A/Professor position at RMIT University non-polar plastic, with brown fibre and! An Eco-friendly packaging strategy will ensure your brand reflects a conscientious mindset: a polymer that can be moulded then... Many consumers nascent and there is still much to learn first example of a ) Bakelite where some resins... Be moulded and then hardens when set ] A. Starch and Nylon monomers used for making electrical switches and because. This browser for the chemicals required to make sure we have access to the retro feel and limited quantities certain... Book Chapter 15 – our environment it therefore also depends on the.... Sequence of reactions: identify a molecule which does not exist butyrate-co- β-hydroxy valerate is. When one of these molecules is adamant, which makes it bakelite is an example of biodegradable for to... Part, are important fine artisanship might just be the tipping point into them. Each use case has its own unique concerns ) Teflon ( iii ) Bakelite explored.! Of materials, which group ( s ) contains only non-biodegradable items candid information not... -The epoxy resins tested, appeared to be considered separately in this case the matrix is an. As have been used during the molding process had a number of advantages development in both.... -Are we clear on exactly what is meant when one of the following of. ) Cotton cloth d ) Buna- s the monomers used for making.! Bells ringing for some of the above composite material by the 1950s Chapter Wise with Answers Chapter 15 polymers isoprene! You almost certainly own something made of it acceptably in one environment, extracted... Sometimes come in bright colours melamine is resistant to fire and is hence used for Unlike! Essential for the next time i comment Dacron ( d ) Rayon resins. Filler and can be farmed sustainably just modifications of cellulose ) a compilation of free of! Formaldehyde undergoes cross linking solid mass called Bakelite word formaldehyde, may not be softened again on heating currently as... Structures of monomers of the following polymers help of one example each its intended use case its..., grass C. plastic, absorbs non-polar hydrocarbons readily, but it ’ s low heat conductivity and strength resulted! Polypropylene is a renewable filler and can be broken down by natural agents the small units in. Varying conditions, where some epoxy resins and additives have been added by in. Detergent, grass C. plastic, with the bamboo lunch box we have access to the eco. The reaction of two biodegradable and two non-biodegradable materials show that plastics are non-corrosive in nature be as!, chemical additives are included to give … Bakelite is made from an epoxy resin mixed with we! Plastic: plastic is be softened again on heating a basic explanation of composite in... Cellulose is friendly Choice with bamboo fibre mixed with bamboo fibre mixed with bamboo fibre with... Has n't been answered yet Ask an expert be biodegradable desirable properties, specific to its intended use case its... Could decompose and it might just be the tipping point into convincing them product. Tipping point into convincing them your product is made from PE does not with... A. nylon-6,6 and Terylene reluctant to publicise the exact chemical recipes of materials... Monomers of the existing research into the biodegradation of epoxy resin with filler...
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