摘要
提供了三元乙丙橡胶(EPDM)交联的一种方法.以二甲苯为溶剂,溶液法制备马来酸酐(MAH)接枝EPDM,然后向溶液中加入适量碳酸钙(CaCO3),与已接枝的马来酸酐(MAH)反应.待反应完全后,滴加丙酮作为沉淀剂,沉淀物真空干燥,制得EPDM-g-MAH/CaCO3弹性体复合材料.溶解、溶胀及拉伸性能测试结果表明,复合材料样品已形成有效的交联,且材料的抗张强度、断裂伸长率和模量均得到较大幅度的提高,当CaCO3含量达到体系总重的20%时,复合材料呈现最佳力学性能.上述实验结果是因为碱性的CaCO3的Ca2+可以与接枝在EPDM上的MAH发生配合反应,进而成为EPDM的交联中心,形成有效交联,从而促进了EPDM机械性能的提高,ATR-FTIR和TGA的测试结果被用于证实上述观点.
A method was applied to form crosslinking networks in the ethylene-propylene-diene terpolymer （EPDM） grafting maleic anhydride （EPDM-g-MAH） matrix with calcium earbonate（CaCO3 ） particles. The tensile test showed that the tensile strength and the elongation at break of the EPDM-g-MAH/CaCO3 composites were improved significantly,and when the content of CaCO3 was about 20 wt% in the composites, the maximum tensile properties were achieved. The results of swelling and solution tests showed that the composites had formed evident crosslinking structure. The results of ATR-FTIR spectrum and TGA showed that the acid-base reaction between CaCO3 and MAH had ocurred.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2006年第1期6-10,共5页
Acta Polymerica Sinica
关键词
沉淀法
接枝
CACO3
MAH
EPDM
Precipitation, Graft, Calcium carbonate, Maleic anhydride, Ethylene-propylene-diene terpolymer
