EPDM/PP TPV的动态硫化行为研究  

Study on Dynamic Vulcanization Behavior of EPDM/PP TPV

作　　者：陈海潮[1] 武智鹏 刘碧桐 范德发 吴敏志 刘志鹏 陈嘉炼 陈登龙[1,2] CHEN Haichao;WU Zhipeng;LIU Bitong;FAN Defa;WU Minzhi;LIU Zhipeng;CHEN Jialian;CHEN Denglong(Fujian Normal University,Fuzhou 350007,China;Quangang Petrochemical Research Institute of Fujian Normal University,Quanzhou 362801,China;Fujian Nanping Sun Cable Co.,Ltd.,Nanping 353000,China;Fujian University of Science and Technology,Fuzhou 350118,China)

机构地区：[1]福建师范大学环境与资源学院,福建福州350007 [2]福建师范大学泉港石化研究院,福建泉州362801 [3]福建南平太阳电缆股份有限公司,福建南平353000 [4]福建理工大学电子电气与物理学院,福建福州350118

出　　处：《橡胶科技》2024年第11期612-619,共8页Rubber Science and Technology

基　　金：中央引导地方科技发展专项(2023L3063)。

摘　　要：测定硫化剂DCP用量为0.5,1,1.5和2份时三元乙丙橡胶(EPDM)胶料的t_(90),探讨t_(90)与EPDM/聚丙烯(PP)热塑性动态硫化橡胶(TPV)动态硫化行为之间的对应关系,通过拉伸性能和凝胶含量测试、扫描电子显微镜和差示扫描量热分析等确定相应硫化剂DCP用量下EPDM/PP TPV的最佳动态硫化时间。试验结果表明:EPDM/PP TPV的拉伸强度、拉断伸长率、撕裂强度以及结晶性能随着动态硫化时间的延长呈先提高后降低的趋势,在t_(90)对应的动态硫化时间达到峰值;当硫化剂DCP用量为1份、动态硫化时间为6 min时,EPDM/PP TPV的综合性能达到最佳,拉伸强度为16.9 MPa、拉断伸长率为531%、撕裂强度为103 kN·m^(-1)、结晶温度为120.55℃、结晶度为64.2%。本研究为快速、精准地确定TPV的最佳动态硫化时间提供了一种简单可行的方案。The t_(90) values of EPDM compounds with the dosage of curing agent DCP at 0.5,1,1.5 and 2 phr were determined,and the corresponding relationship between t_(90) and the dynamic vulcanization behavior of EPDM/polypropylene(PP)thermoplastic vulcanizates(TPV)was discussed.The optimum dynamic vulcanization time of EPDM/PP TPV at the corresponding dosages of curing agent DCP was determined by tensile test,gel content test,SEM and DSC.The experimental results showed that the tensile strength,elongation at break,tear strength and crystallization property of EPDM/PP TPV increased first and then decreased with the extension of dynamic vulcanization time,the maximum value of those properties appeared at the dynamic vulcanization time corresponding to t_(90).When the dosage of curing agent DCP was 1 phr and the dynamic vulcanization time was 6 min,the comprehensive performance of EPDM/PP TPV was the best,with the tensile strength of 16.9 MPa,the elongation at break of 531%,the tear strength of 103 kN·m^(-1),the crystallization temperature of 120.55℃,and the crystallinity of 64.2%.This study provided a simple and feasible scheme for quickly and accurately determining the optimal dynamic vulcanization time of TPV.

关 键 词：三元乙丙橡胶 聚丙烯 热塑性动态硫化橡胶 硫化剂DCP 动态硫化时间 

分 类 号：TQ334[化学工程—橡胶工业]