加核自缩合乙烯基聚合反应体系的热力学特征

Thermodynamic Properties of a Binary Self-condensing Vinyl Polymerization System in the Presence of Core Initiators

从统计力学角度出发,对加核二元自缩合乙烯基聚合反应体系的热力学特征进行了研究.给出了引发核与引发单体间的配料比、反应物的体积分数及引发核的官能度等因素与反应体系热力学统计特征之间的定量关系,重点讨论了内能、比热、多分散性指数和均方回转半径等物理量随反应条件的变化规律.结果表明,通过调控反应温度、改变反应物的浓度(体积分数)和配料比以及选取合适的引发核等方法可制备出具有预期结构和性能的超支化高分子.

A self-condensing vinyl polymerization system consisting of Bf^＊ initiating cores and AB^＊ inimers was studied by the principle of statistical mechanics. As a result,the internal energy,specific heat,polydispersity index and the mean square radius of gyration of hyperbranched polymers were investigated from viewpoint of thermodynamics. In detail,the effect of some reaction conditions,such as temperature,molar ratio of reactants,volume fraction and the functionality of initiating core,were taken into account. The results show that hyperbranched polymers with expected structures and properties can be prepared by means of optimizing parameters of the reaction condition.