Making Polymers Polymerization Reactions:the chemical reaction in which high molecular mass molecules are formed from monomers Two basic types of polymerization: Addition polymerization (chain-reaction); Condensation polymerization (step-reaction) Addition polymerization: CH=CH2 CH-CH2 The repeating CH3 CH3 structural units Monomer Polymer Condensation polymerization: By products nHOOC-C H:-COOH+nHO-CH,-CH,-OH(-CO-C.H,-C00-CH,-CH:-0-) nH,O Monomer 1 Monomer 2 PolymerMaking Polymers Polymerization Reactions: the chemical reaction in which high molecular mass molecules are formed from monomers Addition polymerization : Two basic types of polymerization: Addition polymerization (chain-reaction); Condensation polymerization (step-reaction) 6 4 2 2 6 4 2 2 2 ( ) n nHOOC C H COOH nHO CH CH OH CO C H COO CH CH O nH O − − + − − − → − − − − − − − + The repeating structural units Condensation polymerization: Monomer Polymer Monomer 1 Monomer 2 Polymer By products