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沉淀法制备EPDM-g-MAH/CaCO₃复合材料及其性能的表征

PREPARATION OF EPDM-g-MAH/CaCO₃ COMPOSITES BY PRECIPITATION PROCESS AND THEIR PROPERTY CHARACTERIZATION

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【Author】 ZHANG Jun~1,PAN Yi~1,DING Qingjun~1,LIU Baolei~1,HU Baixing~1,SHEN jian~(1,2)(()~1Research Center of Surface & Interface Chemistry & Chemical Engineering Technology,Nanjing University,Nanjing 210093)(()~2College of Chemistry & Environment Science,Nanjing Normal University,Nanjing 210097)

【机构】南京大学表面和界面化学工程技术研究中心；南京大学表面和界面化学工程技术研究中心南京210093；南京210093；南京师范大学化学与环境学院南京210097；

【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.更多还原

【Abstract】 A method was applied to form crosslinking networks in the ethylene-propylene-diene terpolymer（EPDM） grafting maleic anhydride（EPDM-g-MAH） matrix with calcium carbonate（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.更多还原