The condensation reaction of the two reactants in a controlled acidic or basic medium results in the formation of ortho and para hydroxymethyl phenols and their derivatives. The introduction of Bakelitethe worlds first synthetic plasticin 1907 marked the introduction of the Polymer Age. Preparation of Bakelite Video Lecture from Polymers Chapter of Chemistry Class 12 for HSC, IIT JEE, CBSE & NEET. It is a thermosetting polymer and Bakelite has high strength meaning it basically retains its form even after extensive molding. New York: Marshall Cavendish. [online] Available at: American Chemical Society. Bakelite is the commercial name for the polymer obtained by the polymerization of phenol and formaldehyde. You hop across the nylon carpet to the kitchen, eat your breakfast on a nylon bowl after cleaning your teeth with a toothbrush whose bristles are made of nylon. Although polymers were first invented in the 1860’s, it was not mass-produced until the early 1900’s when Bakelite was used as a replacement for wood, ivory, tortoise-shell, etc. [online] Available at: Wikipedia. Water and steam are then drawn off as the mixture cools, and a viscous brown resin remains. The resultant polymers—known as phenol-formaldehyde resin, urea-formaldehyde resin, and melamine-formaldehyde resin—are widely used as adhesives in plywood and other structural wood products. So, we can, in general, say that Bakelite is a condensation polymer or a phenolic resin. [online] Available at. Bakelite is a polymer made up of the monomers phenol and formaldehyde. Phenol is made to react with formaldehyde. The starting monomers of bakelite are phenol and formaldehyde i.e.Bakelite is a thermosetting polymer. 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Some of the plastic structures are drawn below. Nylon is the most useful synthetic material with applications varying from daily life activities to industries. Structure Bakelite is an early polymer, comprised of a phenol-formaldehyde mixture, with Phenol being derived from coal tar, and Formaldehyde derived from methanol. Polymers. Bakelite is used for making electrical switches and switch boards. The repeating structural unit of most simple polymers not only reflects the monomer(s) from which the polymers are constructed, but also provides a concise means for drawing structures to represent these macromolecules. Recently Viewed Questions of Class 12th chemistry. HDPE is composed of macromolecules in which n ranges from 10,000 to … Monomers join together to form a long straight chain with some branched chains of different lengths. These desired properties include: better mouldability, greater toughness and strength, and greater heat-, water-, chemical-, and shock-resistance. 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2020 structure of bakelite polymer