Biodegradable polymers Abstract To prepare a biodegradable plastic, biodegradable materials such as starches and a non-biodegradable polymer such as a polystyrene, polyurethane, polyethylene, polypropylene, or polycarbonate are treated: (1) under heat, pressure and reagents to break the polymers; and (2) by adding to them an oxidizing agent. There are three main classes of biopolymers, classified according to the monomers used and the structure of the biopolymer formed: polynucleotides, polypeptides, and polysaccharides. Biopolymers are natural polymers produced by the cells of living organisms.Biopolymers consist of monomeric units that are covalently bonded to form larger molecules. Which of the following monomers form biodegradable polymers? In general, biodegradable polymers break down to form gases, salts, and biomass. Monosaccharides are composed of carbon, hydrogen, and oxygen. Demonstrates acceptable shelf life. POLYMERS Short Answer Questions: **1.What is PHBV? निम्नलिखित में से कौन सा मोनोमर बायोडिग्रेडेबल पॉलिमर बनाता है? Polymers are very large molecules made when many smaller molecules join together, end to end. Answer: (d) 7. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Urea and formaldehyde. Biodegradable Polymers Polymers of Commercial Importance Condensation Polymerisation or Step Growth Polymerisation Addition Polymerization As the name suggests addition polymers form when an addition reaction occurs. Question 15. In the following section, the classification of polymers is done using different methods. Lipids are similarly made of fatty acids and glycerol. Complete biodegradation is said to occur when there are no oligomers or monomers left. E.Ann MacGregor, in Encyclopedia of Physical Science and Technology (Third Edition), 2003. By incorporating drug into the biodegradable polymers, the dosage forms releases the drug for a long period of time and can be … [20] The breakdown of these polymers depend on a variety of factors including the polymer and also, the environment the polymer is in. Polymers formed by a straightforward linking together of monomer units, with no loss or gain of material, are called addition polymers or chain-growth polymers.A listing of some important addition polymers and their monomer precursors is presented in the following table. )Write the names and structures of monomers of the following polymers? Which of the following monomers form biodegradable polymers? Answer. How is it useful to man? Biology. 21. Extraordinary progress has been made in the development of practical processes and products from polymers such as starch, cellulose, and lactic acid. Carbohydrate monomers called monosaccharides are composed of units of glucose and fructose. Polymers. Can you explain this answer? Which of the following is an environmental issue associated with burning polymers to dispose of them? The factors affecting the mechanical performance of biodegradable polymers are those that are well known to the polymer scientist, and include monomer selection, initiator selection, process conditions, and the presence of additives. What process makes monomers into polymers? D) the synthesis of polyamides. Advantages of Biodegradable Polymers as Drug Carriers. The first attempts to make synthetic polymers involved A) combining monomers of ethylene to form polyethylene. In this chapter, you will study the various types of polymers that we use in daily life. Thus, monomers are the building blocks of polymers. B) modifying a naturally occurring polymer to form celluloid. Polymers of commercial importance . Classification of polymers NCERT DC Pandey Sunil Batra HC Verma Pradeep Errorless. Differentiate between rubbers and plastics on the basis of intermolecular forces. Synthetic biodegradable polymers () and biotechnologically based polymers (PHA) () are produced and used in the applications mentioned above.. The molecular mass of polymers. Differentiate between biopolymers and biodegradable polymers and give examples of each type. Examples of thermosetting plastics include bakelite, urea-formaldehyde resins. Differentiate between biopolymers and biodegradable polymers and give examples of each type. Chemistry. A polymer is a large molecule composed of many smaller units called monomers that are bonded together. During addition Thermosetting polymers are cross-linked or heavily branched polymers which get hardened during the molding process. A vast majority of biodegradable polymers studied belongs to the polyester family, which includes polyglycolides and polylactides. Which one of the following monomers form biodegradable polymer? Proteins Carbohydrates Nucleic acids. Ans. Phenol and caproic acid. 7. **2. Nature has provided us a variety of polymers which can be produced by the biological systems in plants and animals. Biological polymers are large molecules composed of many similar smaller molecules linked together in a chain-like fashion. Phenol and formaldehyde undergo condensation to give a polymar (A) which on heating with formaldehyde gives a thermosetting polymer (B). Physics. Synthetic polymers are mostly non-biodegradable i.e., it is very difficult to dispose off the polymeric waste, e.g., polythene bags. Commonly found polymers include carbohydrates, lipids or proteins, and are all made of repeating monomer units. 53. These plastics cannot be softened again on heating. 1. Biopolymers and Biodegradable Polymers. (i) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid (ii) Glycine + amino caproic acid (iii) Ethylene glycol + … 54. Alkenes can be used to make polymers. NCERT P Bahadur IIT-JEE Previous Year Narendra Awasthi MS Chauhan. C. 3-hydroxybutanoic and 3-hydroxypentanoic acid. This test is Rated positive by 92% students preparing for Class 12.This MCQ test is related to Class 12 syllabus, prepared by Class 12 teachers. Amino acids Monosaccharides Nucleotides. ... Monosaccharides are monomers that can be joined together to form more complex carbohydrates. Ethylene glycol and terephthalic acid. Students can solve NCERT Class 12 Chemistry Polymers MCQs Pdf with Answers to know their preparation level. Biodegradable polymers are highly desirable in their conditions as they degrade in the body to biologically inert and compatible molecules. Many polymeric materials having chain-like structures similar to polyethylene are known. Monomer: A monomer can be defined as a molecule, which acts as a basic unit for the synthesis of polymers. € 1 (a) €€€€Draw the structure of the monomer used to form polymer P. ... €€€€ Draw the structure of each of the following isomers of C5H8O2 Label each structure you draw with the correct letter L, M, N, P or Q. The repeating monomers form a linear or branch structure depending on the type of monomer. Biodegradable polymers. The monomers combine to form a … Question 17. In addition polymer, monomer used is (A) unsaturated compounds (B) saturated compounds (C) bifunctional saturated compounds Multiple Choice Questions. The following Chapter 2–4 will describe in more detail the key prerequisite for biodegradability followed by a description of the synthesis properties and processing of the various biodegradable polymers. (A) 3-hydroxybutanoic acid + 3-hydroxypentanoic acid (B) Glycine + amino caproic acid (C) ethylene glycol + phthalic acid (D) both a and b. Introduction. The groups of atoms or molecules that interconnect to form a polymer are known as monomers. Answer: Polymers are high molecular mass macromolecules, which consist of repeating structural units derived from monomers. 6. Polymers have a high molecular mass (10 3 − 10 7 u).In a polymer, various monomer units are joined by strong covalent bonds. How can biodegradable synthetic polymers be made. (a) 3-hydroxybutanoic acid +3-hydroxypentanoic acid (b) Glycine + aminocaproic acid (c) Ethylene glycol + phthalic acid (d) Caprolactam Solution: (a, b) The polymers which are easily decomposed and not harmful for the environment are known as biodegradable polymer. Books. Which of the following monomers form biodegradable polymers? 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