论文部分内容阅读
用链长分布不同的活性聚苯乙烯子聚物与二乙烯基苯进行阴离子嵌段共聚,合成了一系列两相模型交联网络。以作者等提出的方法测定了所合成网络的结构非均一因子Z。实验测定的网络结构非均一因子Z与交联前聚苯乙烯活性链的分子量分布宽度指数d之间有平行的相应变化规律,表明所给予的非均一因子Z的物理意义是合理的。同时说明,子聚物链长分布较宽时,在网络的高交联区中除了二乙烯基苯外,还有一些对溶胀无贡献的子聚物以悬挂链的形式存在。
A series of two-phase cross-linked networks were synthesized by anionic block copolymerization of living polystyrene with different chain lengths and divinylbenzene. The method proposed by the authors was used to determine the structural heterogeneity Z of the synthesized network. The experimental results show that the heterogeneity of network structure Z and the molecular weight distribution width index d of the active phase of the polystyrene before cross-linking change in a parallel manner, indicating that the physical meaning of the heterogeneous factor Z given is reasonable. In the meantime, besides the divinylbenzene in the high cross-linking region of the network, some sub-polymers that do not contribute to the swelling exist in the form of dangling chains.