两亲性大分子单体的合成及其在吸水膨胀橡胶中的应用研究

Preparation of Amphoteric Macromonomer and Its Application in Water-swellable Rubber

对两亲性大分子单体香茅醇马来酸单酯羧酸铵(CMPA)的合成及其在吸水膨胀橡胶(WSR)中的应用进行研究。结果表明:利用CMPA通过反相乳液聚合法制备的改性吸水树脂平均粒径为0.5μm,粒径分布比较均匀,且具有较好的热稳定性;改性吸水树脂在WSR中的分散性较好,相容性提高,改性吸水树脂的加入对橡胶的硫化过程有促进作用,对WSR的硬度基本无影响,可提高拉伸强度、拉断伸长率和撕裂强度;当CMPA质量占吸水树脂质量的5%时,WSR的吸水膨胀率为367%,且综合物理性能较好。

The synthesis of amphoteric macromonomer CMPA and its application in water- swellable rubber（WSR） were studied. The results showed that the water-absorbable resin,which was prepared by inverse emulsion polymerization and modified by CMPA, had uniform particle size, average particle diameter of 0.5 μm and good thermal stability. The dispersion and compatibility of CMPA modified water-absorbable resin in WSR were improved. When the modified water-absorbable resin was added, the vulcanization process of WSR was accelerated,the hardness of the vulcanizates was unchanged,and the tensile strength, elongation at break and tear strength were improved. When the mass percentage of CMPA in water-absorbable resin was 5%, the rate of water absorption of WSR reached 367% ,and the comprehensive physical properties were good.