ADMET A Step-Growth Polycondensation

ADMET has been shown to be a step-growth polycondensation reaction [31[. The kinetics of step-growth polymerization and consequences thereof are completely different than those of chain polymerizations. Since ROMP and many other single-site transition metal-catalyzed polymerizations discussed in this book proceed 

In the case of polyesterification, the condensate is water or an alcohol, which are somewhat more difficult substances to remove from the reaction. Removal of ethylene may be accomplished by applying vacuum to the reaction mixture or by passing an inert carrier gas over the reaction, although moderately high molecular weights can be achieved at room pressure without active removal of ethylene. For these reasons, high DP is attainable via ADMET, as demonstrated by a reported DP of almost 830 for the polymerization of 1,9-decadiene by a tungsten-based catalyst [31]. 

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