摘要
研究了偶联剂对不同粒径白炭黑(15 nm、30 nm、80 nm)/天然橡胶纳米复合材料的硫化特性、力学性能、应力软化效应、Payne效应、损耗因子、压缩生热和动态热机械性能的影响,并与未加入偶联剂的复合材料进行对比。结果表明:加入偶联剂Si69使白炭黑在橡胶中的分散性提高,增强白炭黑与橡胶基体之间的结合,提高白炭黑/NR复合材料的力学性能,降低胶料的正硫化时间;白炭黑粒径越小Si69的作用越明显,越有利于复合材料的硫化特性和力学性能的提高;添加Si69使15 nm和30 nm白炭黑复合材料的Payne效应、损耗因子和定负荷压缩生热的温升降低,但是对80 nm白炭黑复合材料的影响不大。
The effect of coupling agent silane Si69 on properties of nanocomposites of nature rubber with different sized nano-silica （15, 30 and 80 nm）was investigated in terms of curing performance, mechanical properties, Mullins effect, Payne-effect, loss factor, the dynamic heat build-up and dynamic mechanical property etc. while taking the same composites without coupling agent as comparison. Results show that with the addition of the coupling agent $i69, the dispersity of nano-silica in the rubber and the binding of nano-silica with the rubber matrix were improved; the mechanical properties of nano-silica/na- ture rubber composite were effectively enhanced and the positive sulfuration time t90 was shortened. It is noted that the smaller size of the nano-silica is, the better positive effect on the performance and mechanical properties of the composite can be obtained. Due to the addition of the coupling agent Si69, the Payne-effect, loss factor and the dynamic heat build-up can be reduced for the composites with nano-silica of 15 nm and 30 nm, respectively, but is not obvious for the ones with 80 nm silica.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2015年第8期607-612,共6页
Chinese Journal of Materials Research
基金
国家自然科学基金51173110
51103086
沈阳市应用基础研究F12-277-1-32资助项目~~
关键词
复合材料
白炭黑
硅烷偶联剂
静态力学性能
动态力学性能
PAYNE效应
composites, nano-silica, silane coupling agent, static mechanical properties, dynamic mechanical properties, Payne-effect
