PDF (1636K)
摘要
将实验室自制的笼型八聚(二甲基硅氧基)倍半硅氧烷作为乙烯基硅橡胶的交联剂,再添加补强填料白炭黑和耐热填料纳米Fe2O3,制备出一种耐高温硅橡胶复合材料。通过傅里叶变换红外光谱仪、核磁共振氢谱仪对笼型八聚(二甲基硅氧基)倍半硅氧烷进行结构表征。结果表明,当乙烯基硅油中Si—Vi与笼型八聚(二甲基硅氧基)倍半硅氧烷交联剂中Si—H的摩尔比为1∶1,白炭黑质量分数为20%,硅树脂质量分数为10%,纳米Fe2O3质量分数为8%时,硅橡胶复合材料的耐热温度达到470.68℃,剪切强度可达到0.92MPa,拉伸强度为0.99MPa。
Abstract
The preparation of a kind of heat resistant silicone rubber was completed by the basis of vinyl silicone rubber,octa(hydroidmethylsiloxy)-silsesquioxane as the crosslinking agent,silica as reinforcing filler,and nano Fe2O3 as heat-resistant filler.Among them,octa(hydroidmethylsiloxy)-silsesquioxane was synthesized by self as heat resistant silicone rubber crosslinking agent.The structure of cta(hydroidmethylsiloxy)-silsesquioxane was characterized by Fourier transform infrared spectrometry (FT-IR),nuclear magnetic resonance hydrogen spectroscopy(1H-NMR).It turned out that the mass ratio of the Si—Vi of the vinyl siloxane oil and the silicon hydrogen bond in the crosslinking agent was 1∶1,the amount of silica was 20% the amount of silicon resin was 10%,the amount of Fe2O3 was 8%,the initial decomposition temperature of silicone rubber can reach 470.68℃,the shear strength was 0.92MPa,the tensile strength was 0.99MPa.
关键词
笼型八聚(二甲基硅氧基)倍半硅氧烷
/
耐热性能
/
强度
Key words
cage type octa(hydroidmethylsiloxy)-silsesquioxane
/
heat resistance
/
strength
笼型八聚(二甲基硅氧基)倍半硅氧烷的合成及其对硅橡胶复合材料性能的影响[J].
化工新型材料, 2019, 47(10): 91-95 DOI:
[1] 刘嘉,苏正涛,栗付平.航空橡胶与密封材料[M].北京:国防工业出版社,2011:77.
[2] 苏正涛,秦瑞祥,朱华,等.苯基硅橡胶的热空气老化性能研究[J].有机硅材料,2012,26(4):248-250.
[3] 张玉龙,张进生.特种橡胶及应用[M].北京:化学工业出版社,2011:1-3.
[4] 来国桥,幸松民.有机硅产品合成工艺及应用[M].北京:化学工业出版社,2010:528-530.
[5] Fateh-Alavi K,Núnez M E,Karlsson S,et al.The effect of stabilizer concentration on theair-plasma-induced surface oxidation of crosslinked polydimethyl-siloxane[J].Polymerdegradation and Stability,2002,78(1):17-25.
[6] 孙希路,刘春霞,许鑫江,等.耐高温硅橡胶的研究进展[J].有机硅材料,2018,32(1):66-70.
[7] 刘光勋,孙全吉,吴娜,等.交联剂对高强度缩合型室温硫化硅橡胶性能的影响[J].粘接,2014,35(8):46-48.
[8] 方炜,蘧建星,林浩军.含氢硅油结构对硅橡胶性能的影响[J].有机硅材料,2017,31(S1):87-90.
[9] 刘丽萍,董立杰,刘景涛,等.含氢硅油交联RTV硅橡胶的形态与性能[J].材料开发与应用,2008,23(5):34-37.
[10] 王清正,谢择民,王金亭,等.硅氮化合物交联的缩合型双组分室温硫化硅橡胶的热稳定性[J].合成橡胶工业,1993,16(4):230-231.
[11] 陈东志.笼型低聚倍半硅氧烷的合成及其在室温硫化硅橡胶中的应用[D].武汉:武汉大学,2011.
[12] 郑传斌,王世行,李齐方.八取代二茂铁的笼型八聚(二甲基硅氧基)倍半硅氧烷的合成[J].精细化工,2008,35(6):49-52.
[13] Agaskar P A.New synthetic route to the hydridospherosiloxanes[J].Inorg Chem,1991,30(13):2707-2708.
[14] 赖亮庆,黄艳华,苏正涛,等.二苯醚亚苯基硅橡胶的性能研究[J].世界橡胶工业,2014,41(6):10-13.
