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