Addition Polymers The addition polymers formed by the polymerisation of a single monomeric species are known as homopolymers. PROPERTIES:-Tensile strength; Higher tensile strength holds a greater weight before snapping. Example: Formation of polythene from ethene. structure with tremendous rigidity. Contributors; When addition polymers are formed, no by-products result. It is because of the unique properties it possesses. They are composed of bifunctional and trifunctional monomers. 1) Polythene 2) PVC A common example of linear polymer. Which is an example of thermosetting polymer? Why bakelite is said to be an example for thermosetting polymer? Question 11. Check Answer and Solution for abov Orientation of monomer units in a polymer molecule A. Tacticity B. Graft C. Linear D. Monomer arrangement 11. Poly(ethene) is an addition polymer. Which of the following represents the example of homopolymer? *Addition polymerization -The addition polymerization means that two monomers react with each other and no other small molecules are generated. B) Both addition polymers and condensation polymers lose some atoms from the original monomers when the polymer is formed. What is bakelite? 20: Which of the following is an addition polymer? In addition polymerisation, the molecules of the same monomer add together on a large scale to form a polymer. Ans. Key Difference – Bakelite vs Plastic Plastic and Bakelite are both organic polymers, having a very large molecular weight though there exists a difference between the two based on their properties and usage. The synthesis of first truly synthetic polymeric material, bakelite, was announced by Leo Baekeland in 1907, through a typical step-growth polymerization fashion of phenol and formaldehyde.The pioneer of synthetic polymer science, Wallace Carothers, developed a new means … But there is no loss of an atom or a molecule. Bakelite is the first synthetic plastic and is known as a “material of thousand uses” due to its versatile applications. Question 10. Bakelite, formed from the condensation reaction of phenol with formaldehyde, became hugely popular – perhaps you have seen products with Bakelite, such as … (A) Polystyrene (B) Nylon (C) PVC (D) Polypropylene. Give one example of each. These included other types of cast phenolic resins similar to Catalin , and urea-formaldehyde resins, which could be made in brighter colors than polyoxy­benzyl­methylene­glycol­anhydride. These polymers have many cross-linking bonds that give rise to a network-like structure. They are very rigid, hard, and brittle. The first truly synthetic plastic was bakelite, developed by Leo Baekland between 1905 and 1914. Some examples include, bakelite and melamine formaldehyde resin. Here are 100 most important Multiple choice questions and answers on Polymer and Polymerization for the entrance exams. Differentiate between the modes of formation of an addition polymer and a condensation polymer. Addition Polymerization: Example, poly ethane, Teflon, Polyvinyl chloride (PVC) Teflon is formed by step growth polymerisation. A. Bakelite B. Melamine C. Branched D. Cross-linked 10. Addition polymers: Polyvinyl chloride, polythene.Condensation polymers: Terylene, Bakelite. 18: Which is used in formation of nylon-66? Odd one out: choose the letter of the word that is not related from the other choices. Other Ways to Classify Polymers Classification Based on Polymerization. EXAMPLES-Bakelite,formaldehyde etc. These questions are likely to appear in entrance exam of MBBS, ENGINEERING , BDS, BN, BMLT, AG , BVSC and various other medical and paramedical entrance exams. Bakelite and melamine are examples in this category. USES: It is used as a material resistant to heat and chemical attack in household works. -It requires two like molecules. Bakelite, trademarked synthetic resin invented in 1907 by Belgian-born American chemist Leo Hendrik Baekeland. The polymer is a long chain molecule which is formed by joining many small molecules called monomers. SOME IMPORTANT POLYMERS NATURAL AND SYNTHETIC LIKE POLYMERS LIKE POLYSTERS, BAKELITE, RUBBER, BIODEGRABLE AND NON-BIODEGRABLE POLYMERS 1. 19: Which of the following has ester linkage? (a) PMMA (b) Nylon- 6, 6 (c) Dacron (d) Bakelite. These polymers contain bi-functional and tri-functional monomers and strong covalent bonds between various linear polymer chains. 1 answer. Question 1. Solution: Bakelite is a thermosetting polymer. Type Addition polymer Bakelite Monomer Phenol and Formaldehyde Type Condensation polymer Natural Rubber Monomer Isoprene Type Addition polymer. The reaction is shown in the graphic on the left. Which of the following is not an example of addition polymer ? In addition to the original Bakelite material, these companies eventually made a wide range of other products, many of which were marketed under the brand name "Bakelite plastics". Give two examples of each (i) linear polymer (ii) Network polymer. They have a stronger covalent bond in comparison to other linear polymers. ⇒ Zeigler process produces high density polythene. Historical aspects. Familiar examples of cross-linked polymers are Bakelite, rubber, and casting (boat) resin. The synthesis of bakelite starts with the reaction between formaldehyde (H 2 CO) and phenol (C 6 H 5 OH) to form a mixture of ortho- and para-substituted phenols. The first semisynthetic polymer was actually made from a natural polymer. Examples of such polymers include bakelite and melmac. What is Bakelite Plastic? An example is vulcanized rubber. The process can be … Which of the following polymer is an example of fibre [AIIMS 2000; Pb. Addition polymers are generally formed by chain growth polymerisation. Condensation polymers are generally formed by step growth polymerisation. Based on the mode of polymerisation, it is classified into; Addition polymers: Polymers are formed by the repeated addition of monomers with double and triple bonds. When addition polymers form, ... Styrene-butadiene rubber is an example of a a. copolymer b. natural elastomer c. natural cross linked polymer Bakelite is formed by step growth polymerisation. During addition polymerization, the monomers rearrange themselves to form a new structure. Again there are four types of addition polymerizations which are. It is an addition polymer of tetraflouroethylene.It is bad conductor of heat. uses no catalyst. Along came Bakelite – which is the first example of a truly synthetic polymer (the rest were just modifications of cellulose). All India 2013) Answer: Linear polymers: Polythene, Polyvinylchloride. PVC (polyvinyl chloride), which is found in plastic wrap, simulated leather, water pipes, and garden hoses, is formed from vinyl chloride (H 2 C=CHCl). It is further classified into, A) Glucose done clear. The double bonds in monomers break and they join to form a big molecule. CET 2001] A) Silk done clear. Bakelite done clear. 16: Three dimensional molecules with cross links are formed in the case of a _____ 17: Which is not polymer? Polymer obtained by condensation polymerization is 1) Polythene 2) Teflon 3) Phenol-formaldehyde 4) Nitrile rubber 2. Ever wondered why the plastic Bakelite was used to make those bangles and chess pieces? together to form a 3 dimensional network polymers. Other Addition Polymers. Plus Two Chemistry Polymers Three Mark Questions and Answers. (a) Distinguish between homopolymers and copolymers. A. Bakelite B. Melamine C. Branched D. Poly-vinyl chloride 9. They have a very strong intermolecular force. The best example is polymerization of ethylene. Formation of a condensation polymer, on the other hand, produces H 2 O, HCl, or some other simple molecule which escapes as a gas. Give one example of each of these ... Monomers combine together with the loss of molecules like H 2 O, NH 3, etc. Presented here are the properties and other uses of Bakelite you should know about. Answer: Bakelite is the condensation polymer of phenol and formaldehyde. Bakelite is an example of polymer. It allows ethene molecules to join together to form a single product, so it is an example of an addition reaction. C) Addition polymers contain all of the atoms of the original monomers, but condensation polymers do not. C) Urea-formaldehyde resin done clear. A) Both addition polymers and condensation polymers contain all of the atoms of the monomers. What is its use? Examples – Bakelite, melamine, etc. Which of the following is an addition polymer . A familiar example of a condensation polymer is nylon, which is obtained from the reaction of two monomers. The monomers used are unsaturated compounds like alkenes, alkadienes and their derivatives. These polymers are formed when linear polymeric chains are connected together to make up a three dimensional network structure. Free Radical Polymerization: Here the addition polymer forms by addition of atoms with a … It is used for … Polyacrylonitrile is an example of (a) addition polymer (b) condensation polymer (c) natural polymer (d) None of these. Which compound form linear polymer due to H-bond? 9. Addition polymers are a type of polymer in which all the monomers are unsaturated or to simply to say are alkenes. It is a phenol formaldehyde resin, formed from condensation reaction of phenol and formaldehyde Examples: Terylene, Bakelite, ... Related questions 0 votes. produces low density polythene. Give one example. iv) ... As the name suggests addition polymers form when an addition reaction occurs. Some common examples are Proteins (which are found in humans and animals alike), ... thermosetting polymer is that of Bakelite, which is used in making electrical insulation. Addition and condensation polymers can exist with a cross-linked network, depending on the monomers used in the synthesis. Polymers can also be classified on the basis of mode of polymerisation into two sub groups. Question 47. Fibers. (b) What are biodegradable polymers? Notice how every other carbon must have a chlorine attached. Modelling addition polymers. Network polymers: Bakelite, Melamine. Most natural polymers being employed at early stage of human society are of condensation type. 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