Effect of sulfur-containing silane couping agent on curing property and mechanical properties of SiO2-NR composites
CUI Lingfeng
XIONG Yuzhu
DAI Jun
LI Xin
WU Shengxue
WANG Binghui
Abstract：In rubber processing system,according to employing the way of making bis[3-(triethoxysilyl)propyl]tetrasulfide (Si69)and the sulfur be reciprocal properly to keep the internal sulphur content of rubber into contant,further to prepare the composite material of SiO2-NR.The SiO2-NR composite material were characterized by universal tensile testing machine,rotorless rheometer and rubber process analyzer.The effects of different Si69-S ratio on curing property and mechanical properties of SiO2-NR composites were studied.The results show that the curing properties of the composites are improved with the S contents being replaced gradually by Si69,and the degree of agglomeration of silica increased in the rubber matrix,which leads the dispersion to become worse.The higher the curing temperature,the larger the reaction rate constant.With the decrease of Si69 and the increase of S,the elongation at break and tear strength overall trend to increase.When Si69 is 4.2 g,S is 1 g,the tensile strength of vulcanized rubber reach the maximum,which is 33.8 MPa.
Keywords：precipitated silicanature rubbervulcanization temperaturemechanical property
Publication Date：2017-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：5( 48-52 )