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5.33 Lecture Notes: Introduction To Polymer Chemistry

Lecture Notes: Introduction To Polymer Chemistry Polymer : A large molecule (macromolecule) built up by repetitive bonding (covalent) of smaller molecules (monomers) Generally not a well defined structure, or molecular weight. Need to use statistical properties to describe. Polymers are formed by linking monomers through chemical reaction called polymerization. You don t end up with a unique molecule. i monomers chain of monomers i A (A A A)i/3 Homopolymer: all A identical The most produced/used polymers are homopolymers of terminal alkenes. Produced by radical polymerization. i CH2=CH2 (CH2 CH2)i ethylene polyethylene H C=C2 CHCOOCH33 H C-C 2 CHCOOCH33ii methylmethacrylate PMMA , Introduction to Polymer Chemistry Page 2 Copolymers: made up of different monomers i A + i B (A-B)i H C=CHCl22ii+H C=CCl2 v

5.33 Lecture Notes: Introduction To Polymer Chemistry Polymer: A large molecule (macromolecule) built up by repetitive bonding (covalent) of smaller molecules (monomers) • Generally not a well defined structure, or molecular weight. …

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