ABSTRACT
Low-Temperature Polycondensation ................................ 156 6.4 Conclusions .................................................................................. 160 Keywords .............................................................................................. 160 References ............................................................................................. 161
6.1 INTRODUCTION
It is well known [1, 2], that depending on reactionary medium and synthesis carrying out conditions a polycondensation processes can be ceased at different temporal scales of the experiment that in the long run results to a considerable variation of the main parameters characterizing this process: conversion degree Q and molecular weight MW. Let’s note, that the indicated reaction cessation is not defined by the exhaustion of the available reactive groups. At present there are quite enough partial explanations of this effect, applicable to individual combinations of reagents and solvents [1, 2] that does not allows developing general conception of this important effect both theoretically and practically. Therefore for the description of polycondensation process cessation we used much more general notions, namely, irreversible aggregation models. The application of the mentioned models is due to the fact, that any polymerization process in the most general treatment presents unification of small molecules (particles) in much larger macromolecule (cluster).
