Synthetic polymers free-radical chain-growth polymerization

Classification of Polymers Free-Radical Chain-Growth Polymerization Cationic Chain-Growth Polymerization Anionic Chain-Growth Polymerization Stereoregular Polymers Ziegler-Natta Polymerization A WORD ABOUT... Polyacetylene and Conducting Polymers Diene Polymers Natural and Synthetic Rubber Copolymers... [Pg.411]

The most synthetic polymers are prepared by a free radical chain-growth polymerization (active centers are radicals). Other active centers are carbocations (cationic chain-growth polymerization, e.g. isobutylene, vinylether, tetrahydrofuran) and carboanions (anioific chain growth polymerization, e.g. butadiene, ethylenoxide, caprolactam). Also organometallic complexes are used as chain carriers (coordination polymerization, e.g. ethylene, propylene, butadiene). [08IUP2]... [Pg.22]

Major commercial synthetic specialty polymers are made by chain-growth polymerization of functionalized vinyl monomers, carbonyl monomers, or strained ring compounds. Depending on monomer structure, the polymerization may be initiated free radically, anionically, or cationically. Copolymers or terpolymers with random, alternating, block, or graft sequences can be prepared under appropriate reaction conditions. There are numerous mediods used to prepare specialty polymers in the research laboratory. However, only a few are of commercial interest. Of particular commercial interest is synthesis of specialty polymers in solutions, dispersions, suspensions, or emulsions. [Pg.6]