不同金属离子催化剂制备氢化天然橡胶的热氧老化性能对比  

Comparison of thermo-oxidative aging properties of hydrogenated natural rubber prepared by different metal ion catalysts

作　　者：郎秀瑞 刘玉梅[1] 赵文[1] 王海瑞 曹兰[1] 宗成中[1] LANG Xiu-rui;LIU Yu-mei;ZHAO Wen;WANG Hai-rui;CAO Lan;ZONG Cheng-zhong(School of Polymer Science and Engineering,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,山东青岛266042

出　　处：《合成橡胶工业》2022年第5期417-417,共1页China Synthetic Rubber Industry

基　　金：Supported by National Weapons and Equipment Rapid Support Project(FCY 2021092410100055);Natural Science Foundation of Shandong Province(ZR 2020 QE 072);Shandong Province Science and Technology Small and Medium-Sized Enterprise Innovation Capability Project(2021 TSGC 1153).

摘　　要：采用不同金属离子催化剂,通过乳液氢化方法制备了氢化天然橡胶(HNR),研究了生胶的等温氧化诱导时间(OIT)和硫化胶热氧老化前后的拉伸性能变化,考察了金属离子催化剂对HNR热氧老化性能的影响。结果表明,过氧化氢/水合肼/铜离子催化体系中的铜离子对材料的热氧老化性能影响较大,采用铜离子制备的HNR热氧老化后拉伸性能变化率高于天然胶乳,OIT缩短至2.5 min。将铜离子替换为锌离子后制备的HNR,100℃热氧老化72 h后拉伸强度变化率减小至23.91%,扯断伸长率变化率为32.12%,150℃OIT延长至32.4 min,具有更好的热氧老化性能。Natural rubber(NR)has unparalleled comprehensive pro-perties and is widely used in various industries.However,it has the common problems with bad thermal and oxidative properties because of the unsaturated C■C bonds in its cis-1,4-polyisoprene main chain.Hydrogenation is a kind of chemical mo-dification methods to improve the stability against thermal and oxidative degradation during which the unsaturated double bonds are reduced to the stronger saturated single bonds.

关 键 词：氢化天然橡胶 铜离子 热氧老化性能 锌离子 力学性能 

分 类 号：TQ332[化学工程—橡胶工业] TQ426