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