两相交联网络变化对EPDM/NMVQ共混胶力学性能的影响  

Effect of Two-phase Crosslinking Network on Mechanical 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 and 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4期33-38,共6页Special Purpose Rubber Products

摘　　要：选取不同品种的丁腈橡胶(NBR/XNBR/HNBR)对甲基乙烯基硅橡胶(MVQ)进行改性,以提高MVQ的表面张力,使其与选用的乙丙橡胶(EPDM)表面张力接近,有效提高主体共混物的相容性,并进一步考察以形成交联键固定在一起的硅橡胶/丁腈橡胶(NMVQ)在不同改性状态下对共混胶两相交联密度与共混胶性能的影响。结果表明,加入XNBR 1072和NBR 1043的EPDM/NMVQ共混胶的两相模量更为接近,宏观上表现为拉伸强度和拉断伸长率增加,力学性能得到提高。Different kinds of nitrile rubber(NBR/XNBR/HNBR)were selected to blend and modify methyl vinyl silicon rubber(MVQ),increasing the surface tension of the blend and making it close to the selected ethylene propylene rubber(EPDM)to improve the compatibility of the main blend.Furthermore,the relationship between the crosslinking density of MVQ phase and EPDM and the properties of the blend was investigated under different modified MVQ(NMVQ)states of nitrile rubber.The results showed that the two-phase modulus of PEDM/NMVQ blends with XNBR1072 and NBR1043 were closer,the tensile strength and elongation at break of EPDM/MVQ blend increased,and the mechanical properties were improved.

关 键 词：共混橡胶 两相交联密度 网络结构 定伸应力 

分 类 号：TQ333.7[化学工程—橡胶工业] TQ333.93