二段硫化对聚丙烯酸酯橡胶结构与性能的影响

Influence of Post Vulcanization on Structure and Properties of ACM

用Ｘ射线能量分散谱仪研究了活性氯型聚丙烯酸酯橡胶（ＡＣＭ）在二段硫化过程中氯元素和硫元素质量分数的变化及二段硫化条件对ＡＣＭ的物理性能、耐热老化性、耐热油老化性、压缩永久变形性的影响。结果表明：二段硫化过程中，橡胶中氯质量分数不断减小，硫质量分数先升后降，交联键中的多硫键转变为双硫键、单硫键或碳碳键，交联结构趋于稳定；二段硫化可改善体系的耐热性、耐热油性及耐压缩永久变形性。

The proportion variation of Cl and S elements during the post vulcanization of ACM and the influence of the post vulcanization conditions on the physical properties,heat resistance,hot oil resistance and compression set of ACM were analysed on EDS(X ray Energy Dispersive Spectrometer).The results showed that the proportion of Cl decreased constantly,the proportion of S increased at first and decreased later,the polysulfide bonds converted to disulfide bonds,monosulfide bonds or carbon carbon bonds,and then the crosslink structure tended to be stable;the heat resistance,hot oil resistance and compression set of ACM compound could be improved by post vulcanization.