Addition polymer

Polyaddition (also called addition polymerization ) is a polymerization reaction, the addition reactions of individual independent polymers (plastics ) forms. Polyaddition reaction is carried out as a step-growth over molecules with low degrees of polymerization, ie, dimers, trimers and oligomers, which together establish new adducts. Only at approximately complete conversions to the polymer, as in the polycondensation, and in contrast to the chain polymerization forms. A polyaddition can be done only if the monomers carry two or more functional groups. The products of the polyaddition be called Polyadducts. Polyaddition is not synonymous with the English word "addition polymerization".

Synthesis Example

An important polyaddition reaction is the production of polyurethanes. The starting materials for the synthesis of polyurethanes are polyfunctional isocyanates and polyols.

The curing of epoxy resins is carried out by polyaddition.

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