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三种或三种以上单体的多元共聚物和共混物是改造材料性能的极重要途径之一。多元共聚物与相应均聚物的多元共混物因微观结构的显著差别而引起性能上的很大差异。故如何利用一种简便快速的方法,鉴别体系是共聚物还是均聚物的共混物以及共聚物和共混物的组成、结构等与性能的关系是值得探讨的问题。 关于共聚物和共混物的组成及结构分析方法有多种,裂解色谱法(PGC)是简便易行的方法之一。本文采用居里点PGC研究苯乙烯(S)—甲基丙烯酸甲酯(MMA)—丙烯腈(AN)三元共聚物和三单体均聚物的共混物的组成分析,以及结构差异的鉴别等。
Multicomponent copolymers and blends of three or more monomers are one of the most important ways to modify the properties of a material. Diverse blends of the multi-component copolymer with the corresponding homopolymer result in significant performance differences due to the significant differences in microstructure. Therefore, how to use a quick and easy method to identify whether the system is a copolymer or a homopolymer blend, and the composition of the copolymer and the blend, the structure and the relationship between the properties is worth discussing. There are many different methods for the composition and structure analysis of copolymers and blends. Pyrolysis chromatography (PGC) is one of the simple and easy methods. In this paper, the composition of the blend of styrene (S) -methyl methacrylate (MMA) -acrylonitrile (AN) terpolymer and trimer homopolymer was analyzed by PGC at Curie point, and the structural differences Identification and so on.