关于Aa-Bb型缩聚物网络结构的研究——溶胶凝胶分配理论

溶胶凝胶分配理论是在分子水平上表征交联网络结构的有效工具。由Flory等建立和发展起来的这一理论,由于引用了溶胶相无分子内环化反应的假定,特别是在理论推导中将分子内交联反应与分子间的链增长反应对两相分配的贡献未能加以区别,致使理论与实验不符。本文充分考虑了经典理论的这些缺欠,建立了更为符合客观实际的理论模型。同时,用十分简便的方法推导了反应溶胶分数,溶胶反应程度,分子内和分子间总反应程度等量宏观联系的参数方程组。以聚酯为模型化合物的实验研究与本文所得理论结果基本相符。

THE INVESTIGATION ON THE NETWORK STRUCTURE OF Aa-Bb TYPE POLYCONDENSATION (1) THE SOL-GEL DISTRIBUTION

The sol-gel distribution theory is a powerful tool to deal with the structure of crosslink-ing networks in the molecular level in classical theory. There are two problems, which caused the descrepances between experimental results and classical theory. This paper takes into account the effect of intramolecular reaction to sol-gel distribution and derives equations containing all parameters of reaction successfully. The experimental results with polyester as model compound support the theoritical ones of this paper.