交联网络对EPDM/POE共混胶耐老化及耐高温性能的影响  

Effect of crosslinking network on the aging and high temperature resistance of EPDM/POE blended rubbered rubber

作　　者：公维颖 张勇 邓涛[1] Gong Weiying;Zhang Yong;Deng Tao(Qingdao University of Science and Technology,Qingdao 266042,Shandong,China;Luohe Litong Hydraulic Technology Co.LTD.,Luohe 462000,Henan,China)

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042 [2]漯河利通液压科技股份有限公司,河南漯河462000

出　　处：《橡塑技术与装备》2023年第7期42-47,共6页China Rubber/Plastics Technology and Equipment

摘　　要：研究了通过调控硫载体(TMTD)和过氧化物(DCP)的比例,在三元乙丙橡胶(EPDM)/聚烯烃弹性体(POE)共混胶硫化和热氧老化过程中交联网络结构的变化,对共混胶热氧老化前后常温及高温拉伸力学行为的影响。研究表明,加入硫载体TMTD后,可显著缩短共混胶的t90,但当TMTD加入量为2份时,反而略微延长t90;同时TMTD的加入,热氧老化前,可显著提高共混胶的模量,常温拉伸条件下,改善共混胶的拉伸强度,高温拉伸条件下,提高共混胶的耐高温性能;热氧老化后,共混胶常温拉伸力学性能整体相当,高温拉伸条件下,拉伸强度和拉断伸长率下降明显。By adjusting the ratio of sulfur carrier(TMTD)and peroxide(DCP),the changes of cross-linking network structure during vulcanization and thermo oxidative aging of EPDM rubber/polyolefin elastomer(POE)blended rubbered rubber was studied,and the effects of the changes on the tensile mechanical behavior of the blended rubbers at room temperature and high temperature before and after thermo oxidative aging were studied.Research has shown that the addition of sulfur carrier TMTD can significantly shorten the t90 of the blended rubber,but when the amount of TMTD added is 2 parts,it slightly prolongs the t90.At the same time,with the addition of TMTD,the modulus of the blended rubber can be significantly increased before thermal oxygen aging.Under normal temperature stretching conditions,the tensile strength of the blended rubber can be improved, and under high temperature stretching conditions, the high-temperature resistance of the blended rubber can be improved. After thermal oxygen aging, the overall tensile mechanical properties of the blended rubber at room temperature are equivalent, but under high-temperature tensile conditions, the tensile strength and elongation at break decrease significantly.

关 键 词：乙丙橡胶 聚烯烃弹性体 交联网络 力学性能 

分 类 号：TQ333.4[化学工程—橡胶工业]