摘要
探讨了气相白炭黑的比表面积和表面特性对硅橡胶力学性能的影响,同时采用扫描电镜和溶胀法分别研究了不同表面特性白炭黑补强硅橡胶的拉伸断面形貌和交联密度。结果表明:随着疏水性白炭黑比表面积的增加,硅橡胶拉伸强度和断裂伸长率增加;对比发现,疏水性白炭黑的补强效果优于亲水性白炭黑,这是由于疏水性白炭黑在橡胶基体中分散更加均匀,而且疏水性白炭黑补强硅橡胶的交联密度更大。
The effects of specific surface area and surface characteristics of fumed silica on the mechanical properties of silicone rubber were investigated as well as the tensile fracture surfaces and crosslink densities of silicone rubber were studied using SEM and swelling method,respectively.The experimental results showed that the tensile strength and break elongation of silicone rubber increased with the increasing of specific surface area of hydrophobic fumed silica.Compared to hydrophilic fumed silica,hydrophobic fumed silica exhibited better reinforcement on the silicone rubber,which is due to the more uniform dispersion of hydrophobic fumed silica and higher crosslink densities of silicone rubber reinforced with hydrophobic fumed silica.
出处
《弹性体》
CAS
北大核心
2011年第2期57-60,65,共5页
China Elastomerics
关键词
硅橡胶
比表面积
表面特性
白炭黑
力学性能
silicone rubber
specific surface area
surface characteristics
fumed silica
mechanical property
