Polymers Introduction to Polymers Poly = many, mer = unit, many units Polymer science is relatively a new branch of science . It deals with chemistry physics and mechanical properties of macromolecule . A polymer is a large molecule which is formed by repeated linking of the small molecules called “monomers”. OR polymer is organic substance made up of many repeating units or building blocks of molecules called ‘monomers’ POLYMER • Combine, many monomers to create a polymer. • Polymer is often used as a synonym for ‘plastic’. • All plastic are polymers. Poly mers are made up of many Mono mer ↓ ↓ ↓ ↓ Many Units One Unit Monomer molecules joined in units of long polymer. It consist of large no. of repeating units known as monomers The no. of repeating units in a chain of polymer is known as degree of polymerization POLYMER a family of natural and synthetic materials made of repetition of high weight molecules in a form of flexible chain NATURAL POLYMER • Collagen • Gelatin • Silk • Wool • Natural rubber • DNA SYNTHETIC POLYMER • Polyethylene terephthalate (PET) • High Density Polyethylene (HDPE) • Polyvinyl Chloride (PVC) • Low Density Polyethylene (LPDE) • Polypropylene (PP) • Polystyrene (PS) MONOMERS • The smallest unit of polymer which gets polymerised under certain conditions to form polymer, called monomers. • EXAMPLE: H n H high pressure/trace O 2 C C catalyst H H ethene H H C C H H n poly( ...
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