磷元素对汽车内饰用模具硅橡胶硫化行为的影响  

Effect of Phosphorus on Vulcanization Behavior of Silicone Rubber for Automobile Interior Decoration

作　　者：潘鸽 王晓伟 李双双 付志磊 刘芳 马蕊 许东华[1] 姚卫国[2] 窦艳丽[2] 管东波[2] 石彤非[1] PAN Ge;WANG Xiao-wei;LI Shuang-shuang;FU Zhi-lei;LIU Fang;MA Rui;XU Dong-hua;YAO Wei-guo;DOU Yan-li;GUAN Dong-bo;SHI Tong-fei(State Key Laboratory of Polymer Physics and Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,Jilin;Key Laboratory of Automobile Materials,Ministry of Education,College of Materials Science and Engineering,Jilin University,Changchun 130025,Jilin)

机构地区：[1]中国科学院长春应用化学研究所,高分子物理与化学国家重点实验室,长春130022 [2]吉林大学材料科学与工程学院,教育部汽车材料重点实验室,长春130025

出　　处：《有机硅材料》2019年第6期435-440,共6页Silicone Material

基　　金：国家自然科学基金(21274152);吉林省科技厅科技发展计划项目(20190302092GX);长春市科技计划科技创新“双十”工程重大科技攻关项目(17SS016)

摘　　要：针对汽车内饰用模具硅橡胶出现的硫化不充分问题,通过向双组分室温硫化(RTV-2)加成型液体硅橡胶中加入一定量的三(2,4-二叔丁基苯基)亚磷酸酯与磷酸三苯酯,研究了不同价态磷(P)元素对硅橡胶硫化行为的影响以及引起铂催化剂中毒的临界P元素含量.结果表明,聚氯乙烯(PVC)表皮中引起硅橡胶不完全硫化的主要因素为不饱和态的P元素.不饱和态P元素轨道上的共享电子对会与铂结合,发生不可逆反应,引起铂催化剂中毒,从而导致RTV-2硅橡胶无法完全硫化.在实际生产中,需保证PVC表皮中不饱和P元素含量小于导致铂催化剂中铂元素中毒的临界值,RTV-2硅橡胶方可完全硫化,复制出清晰的PVC表皮花纹.In order to solve the problem of insufficient vulcanization of the molding silicone rubber used in automobile interior decoration,a certain amount of tri-( 2,4-bis-tert-butyl phenyl) phosphite( A) and triphenyl phosphate ester( B) were added into RTV-2( two-component room temperature vulcanized) liquid silicone rubber. The influence of different valence state phosphorus( P) on the vulcanization behavior of silicone rubber and the critical content of P for platinum catalyst poisoning were studied. The results show that the main reason which causing the non-vulcanization of silicone rubber in the polyvinyl chloride( PVC) skin is because of the unsaturated P element. The shared electron pairs on the orbit of the unsaturated phosphorus element will combine with platinum,causing an irreversible reaction,and lead to the poisoning of the platinum catalyst,resulting in the incomplete vulcanization of RTV-2 silicone rubber. In the practical production,it is necessary to ensure that the content of unsaturated P element in PVC skin is less than the critical value which causes platinum element poisoning in platinum catalyst,and the RTV-2 silicone rubber can be completely vulcanized to replicate clear PVC skin pattern.

关 键 词：磷元素 加成型硅橡胶 铂催化剂 流变 花纹 

分 类 号：TQ333.93[化学工程—橡胶工业]