非等活性加核自缩合乙烯基聚合体系回转半径的Monte Carlo模拟

Monte Carlo Simulation of the Radius of Gyration of Hyperbranched Polymers Formed in Self-condensing Vinyl Polymerization System in the Presence of Core Initiators with Unequal Reactivity

利用Monte Carlo模拟方法研究了加核自缩合乙烯基聚合反应体系中超支化高分子的二次回转半径随双键转化率的变化情况.在模拟中,重点考察了两类活性基团的反应活性差异、引发核的配比及基团数等因素对超支化高分子均方回转半径的影响.结果表明,上述因素对于超支化高分子的尺度有着显著影响,从而可为调控体系中高分子的空间尺度提供有效途径.

The second radius of gyration of hyperbranched polymers formed in self-condensing vinyl polymerization system in the presence of core initiators was studied by the method of Monte Carlo simulation,in which the unequal reactivity was taken into account.As a result,the roles of the reactivity differences in two types of active groups,the molar ratio and functionality of core initiators were mainly discussed,and it was found that these factors could give rise to a significant influence on the radius of gyration of hyperbranched polymers with and without a core initiator.This provides some useful clues for regulating the dimension of the hyperbranched polymers in the relevant experiments.