三向缩聚及共缩聚反应的胶凝化条件

1.本文从合理地修正和发展Flory的概念着手,注意到支化点与其自身相联结的机率在三向缩聚反应胶凝化现象中的意义,建议以中心支化点再现机率等于1作为一般性的胶凝化条件。从此出发,可以不经过推导分子量分布函数而十分方便地推算任何反应类型的胶疑点。 2.本文推导了大批一般化类型的胶凝点,包括了大量的特例,实际应用时很方便。前人所得结果成为特例包括在本文结果之中。

THE CONDITION OF GELATION FOR THREE DIMENSIONAL POLYCONDENSATION AND COPOLYCONDENSATION REACTIONS

A simple and general method for evaluating the condition of gelation for three dimensional polycondensation and copolycondensation reactions is presented. By reasonable development of Flory's method, the author suggested a new concept for the critical condition of gelation, namely, that the probability for a central branch point to be connected to themselves attains unity. According to this concept without referring to the molecular size distribution function, equations for the gel point for various generalized reaction types were obtained,which include almost all types of reactions encountered in practce. The results previously obtained by other authors appear as special cases of this paper.