调控NMVQ相表面张力对EPDM/NMVQ共混胶性能的影响  

Effect of Surface Tension of NMVQ Phase on Properties of EPDM/NMVQ Blend

作　　者：代欣 郝良赐 刘长顺 邓涛[1] DAI Xin;HAO Liangci;LIU Changshun;DENG Tao(Qingdao University of Science&Technology,Qingdao 266042,China)

机构地区：[1]青岛科技大学高分子科学与工程学院橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《特种橡胶制品》2024年第5期6-10,共5页Special Purpose Rubber Products

摘　　要：为提升三元乙丙橡胶(EPDM)和甲基乙烯基硅橡胶(MVQ)的相容性,向低表面张力的MVQ中添加高表面张力的丁腈橡胶(XBNR/NBR/HNBR)进行改性;实验经接触角测试、表面张力的计算与相界面结构分析,研究了EPDM/改性硅橡胶(NMVQ)共混胶的相容性和力学性能变化。结果表明:NBR与MVQ并用可减小水接触角,提高表面张力,与EPDM共混,能显著增加相界面厚度,拉伸强度和拉断伸长率提升;添加NBR1043的共混胶耐高温性能优异,添加XNBR1072的共混胶耐热氧老化性能出色。To improve the compatibility between ethylene propylene diene monomer rubber(EPDM)and methyl vinyl silicon rubber(MVQ),different types of NBR(XBNR/NBR/HNBR)with high surface tension were added to the low surface tension MVQ for modification.Through contact angle test,surface tension calculation and phase interface structure analysis,the compatibility and mechanical property changes of EPDM/NMVQ blends were studied.The results showed that the combination of NBR and MVQ could reduce the water contact angle and increase the surface tension.Blending with EPDM could significantly increase the thickness of the phase interface,and the tensile strength and elongation at break were improved.The blend rubber with NBR1043 had excellent high-temperature resistance performance,and the blend rubber with XNBR1072 had excellent heat and oxygen aging resistance performance.

关 键 词：硅橡胶 丁腈橡胶 三元乙丙橡胶 相容性 表面张力 

分 类 号：TQ333.4[化学工程—橡胶工业] TQ333.93TQ333.7