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