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