乙烯基质量分数对硅橡胶发泡效果的影响  

Influenceof Vinyl Content on Foaming Effect of Silicone Rubber

作　　者：李刚[1] 许鑫江 辛帅[1] 马凤国[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《有机硅材料》2017年第2期103-106,共4页Silicone Material

摘　　要：以甲基乙烯基硅橡胶生胶为基胶,配合白炭黑等制得硅橡胶泡沫。采用密度测试仪、体视显微镜等表征硅橡胶泡沫的发泡效果。结果表明:当甲基乙烯基硅橡胶生胶中乙烯基质量分数为0.13%时,硅橡胶泡沫的发泡效果较好,表观密度为0.67 g/cm^3,发泡倍率为1.66倍,但拉伸及撕裂强度均偏低,分别为0.76 MPa、5.27 N/mm;若采用不同乙烯基质量分数的硅橡胶生胶复配,当乙烯基质量分数分别为0.03%及0.3%的两种生胶的质量比为72∶28时,硅橡胶泡沫的发泡效果较好,表观密度为0.66 g/cm^3、发泡倍率为1.66倍、拉伸强度0.67 MPa、撕裂强度为5.21 N/mm;两种生胶的质量比为72∶28时,复合硅橡胶的乙烯基质量分数仅为0.11%。Silicone rubber foam was prepared by silicone rubber with different vinyl contents and fumed silica. The foaming effect of silicone rubber foam was characterized by density measuring instrument and stereo microscope. Results show that the foaming of rubber was good, when the vinyl content of silicone rubber is 0. 13 ,the apparent density is 0.67g/cm^3 ,and expansion rate was 1.66 times,the tensile and tear strength are 0.76MPa and 5.27N/mm respectively;when silicone rubber （vinyl content were 0.03 and 0. 3 ） ratio is 72/ 28 ,the apparent density and expansion ratio were 0. 66g/cm^3 and 1.66 times respectively ,tensile strength and tear strength were 0. 666MPa, 5.21N/mm respectively ; when silicone rubber （ vinyl content were 0. 03 and 0.3 ） ratio is 72/28, the vinyl content of the compound silicone rubber is only 0. 11.

关 键 词：乙烯基 泡沫硅橡胶 发泡 拉伸强度 

分 类 号：TQ333.93[化学工程—橡胶工业]