不饱和羧酸盐对硅橡胶/EPDM并用胶结构与性能的影响  

Effects of Unsaturated Carboxylic Salts on the Structure and Properties of Silicone/EPDM Rubber Blend

作　　者：雷卫华[1] 罗世凯[1] 贺传兰[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,绵阳621900

出　　处：《材料导报（纳米与新材料专辑）》2011年第1期418-420,437,共4页

摘　　要：探索了2种不饱和羧酸盐对硅橡胶/三元乙丙橡胶并用胶结构与性能的影响,并与EVA树脂的补强效果进行了比较。实验结果发现,在甲基丙烯酸镁用量较少时,并用胶仍基本保持原有的交联结构,定伸应力升高,强度和伸长率提高;在大用量下,由于不饱和镁盐的就地聚合微米粒子的生成,使并用胶的交联和补强结构发生了变化,橡胶定伸应力、硬度和刚性大幅提高,但伸长率显著降低。甲基丙烯酸锌盐与镁盐相比,定伸应力更高,抗张强度和伸长率略低。EVA树脂的引入使并用胶的定伸应力轻微增大,拉伸强度和伸长率提高,扯断永久变形有所增大。The effects of unsaturated carboxylic salts of Mg and Zinc on the mechanical properties and structure of silicone/EPDM rubber blend were explored. The result shows that, the blend still holds its crosslinking network at low dosage of Mg salt, the stress and tensile strengthen, Shore A hardness increases. At the high dosage of Mg（MAA）2, the crosslink network may be changed by the Mg（MAA）2 in-site polymerization and the formation of micron metallic ions particles, the stress, hardness, and rigidity increased greatly, but the elongation at break decreased. EVA resin improves the tensile strength and elongation of the rubber, hut the permanent set increases.

关 键 词：不饱和羧酸盐 硅橡胶 并用胶 甲基丙烯酸镁 EVA树脂 

分 类 号：TQ330.12[化学工程—橡胶工业]