高效硫化剂对氯丁橡胶硫化反应动力学参数及力学弛豫性能的影响  

Effect of high efficiency vulcanizing agent on vulcanization kinetic parameters and mechanical relaxation properties of neoprene

作　　者：王晨阳 邓涛[1] WANG Chen-yang;DENG Tao(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》2023年第3期241-247,共7页China Synthetic Rubber Industry

摘　　要：采用机械共混法制备了含有不同种类和用量硫化体系的氯丁橡胶硫化胶,考察了新型高效硫化剂三乙酰丙酮合铁[Fe(acac)_(3)]对氯丁橡胶硫化机理、动力学参数及硫化胶力学弛豫行为的影响。结果表明,Fe(acac)_(3)硫化体系在硫化过程中具有可循环硫化的特点,使用0.10份(质量,下同)Fe(acac)_(3)时即可高效硫化氯丁橡胶;与传统金属氧化物硫化体系相比,当仅使用0.25份Fe(acac)_(3)时氯丁橡胶硫化胶的拉伸强度最高且拉伸应力弛豫的平衡值最大;由于Fe(acac)_(3)体系具有可循环参与硫化过程的特性,硫化胶于100℃热氧老化3 d后仍保持较大的压缩应力弛豫平衡值。Chloroprene rubber vulcanizates containing different types and amounts of curing systems were prepared by mechanical blending,and the effects of a new high-efficiency curing agent,ferric acetylacetonate[Fe(acac)_(3)]on the curing mechanism,kinetic parameters and mechanical relaxation behavior of chloroprene rubber were investigated.The results showed that the Fe(acac)_(3) curing system had the characteristics of being able to participate in the vulcanization cycle during the vulcanization process when Fe(acac)_(3) of 0.10 phr(mass,similarby hereinafter)was used,chloroprene rubber could be vulcanized efficiently.Compared with the traditional metal oxide curing system,the tensile strength was higher and the equilibrium value of tensile stress relaxation of the vulcanizate was larger when Fe(acac)_(3) of only 0.25 phr was used.After 3 d of thermo-oxidative aging at 100℃,the vulcanizates still maintained a high compressive stress relaxation equilibrium value due to the characteristics that Fe(acac)_(3) curing system was capable of participating in the vulcanization process circularly.

关 键 词：氯丁橡胶 机械共混法 三乙酰丙酮合铁 硫化机理 硫化反应动力学参数 物理机械性能 弛豫性能 

分 类 号：TQ333.5[化学工程—橡胶工业]