新型加工助剂DF对ACM胶料交联网络结构的影响

Effect of processing aid DF on crosslinking network structure of ACM rubber

研究了自制的新型加工助剂DF对聚丙烯酸酯橡胶 (ACM )交联网络结构的影响 ,并与常规加工助剂硬脂酸和进口加工助剂WB进行了对比分析。试验结果表明 ,3种加工助剂的酸值大小依次为硬脂酸、DF和WB。加工助剂的酸性延迟了碱金属皂 /硫黄硫化体系的硫化进程 ,使硫化反应速度减慢 ,硫化程度降低。加工助剂对一段硫化ACM硫化胶交联密度的影响程度大小依次为硬脂酸、DF和WB。在相同的二段硫化时间内 ,随着加工助剂用量的增大 ,ACM硫化胶的压缩永久变形增大 ,增幅最大的是硬脂酸 。

The effect of a new processing aid DF on the crosslinking network structure of ACM rubber was investigated and a comparison test of DF was made to conventional processing aid (stearic acid) and imported processing aid (WB).The results showed that the acidity values of three processing aids were in order of stearic acid>DF>WB;the acidity of processing aid delayed the curing process of alkali metal soap/sulfur curing system to decrease the curing rate and state;the effects of processing aids on the crosslinking density of the first stage cured ACM rubber were in order of stearic acid>DF>WB;the effects of the increase of processing aids additional level on the increase of the compression set for the second stage cured ACM rubber were in order of stearic acid>WB=DF.