【摘要】 <正> 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。更多还原

【Abstract】 The curie point pyrolysis gas chromato-graphy was used to investigate the pyrolysis of styrene-methyl methylacrylate-acrylonitrile (S-MMA-AN) tercopolymer and ternary polyblend of their homopolymers. Under 660°C pyrolysis condition one can determine the composition of random tercopolymer quantitatively, but there is large error in case of polyblend owing to the pyrolysis of polyacrylonitrile into a few monomer fragments. In this case the composition of tprnary polyblend can be determined quantitatively by two steps.The tercopolymer and the ternary polyblend conld be distinguished on the basis of the differences of their pyrolysis fashions by the method when combining with others.更多还原