Organic Chemistry Module 8 Portage 219 100 VERIFIED SOLUTIONS

Organic Chemistry Module 8 Portage 219 100% VERIFIED SOLUTIONS large molecule made by repetitive linking of smaller units (monomers) very large molecule composed of thousands of covalently bonded atoms (ex: polymer) two ways polymers are made natural polymers synthetic polymers 3 main ways to differentiate polymers Two classifications of Synthetic polymers chain growth polymers are also know as: How are chain growth polymers made? A polymerization involving sequential addition to monomers that are unsaturated (C=C) or have some other reactive functional groups (particularly ethylene and derivatives) what 2 things stops chain growth polymerization? chain-growth polymer: polytetrafluoroethylene monomer: F2C=CF2 nonstick coating, goretex, electrical insulator, chem-resistant coating chain-growth polymer: polyvinylidenedichloride monomer: H2C=CCl2 cling-wrap chain-growth polymer: polypropylene monomer: H2C=CHCH3 carpet fibers, car parts, toys, packaging, houseware chain-growth polymer: polyacrylonitrile monomer: H2C=CH(CN) textiles/fibers, carpets, upholstery chain-growth polymer: polyvinyl acetate monomer: H2C=CH(OCOCH3) elmers glue, silly putty, latex paints chain-growth polymer: polyvinyl alcohol monomer: H2C=CH(OH) eye med- artificial tears chain-growth polymer: polymethylmethacrylate monomer: H2C=C9CH3)COOCH3 clear plastic sheets , blocks, and tubing The defining characteristic of chain-growth polymers formed by the reaction between 2 different functional groups on different monomer molecules with the accompanying loss of some small molecule (typically water) The defining characteristic of step-growth polymers step-growth polymers also known as: functionality of step-growth monomers appearance of monomers in step-growth polymerization how step-growth polymers generally grow how chain-growth polymers generally grow formed by combining 1,6-diaminohexane (amine) with 1,6-hexandioic acid (carboxylic acid) amine functionality reacts with carboxylic acid functionality to form an amide with a corresponding loss of a water molecule naturally occurring step-growth/ condensation polymer examples step-growth polymer: polycarbonate eye glasses, auto parts, drinking glasses step-growth polymer: polyamide body armor, tires, helmets