摘要
制备了表面接枝有聚异戊二烯(PIP)的纳米二氧化硅(SiO_2-g-PIP),并用于增强SBS材料。首先,通过纳米SiO_2表面的羟基与2-(十二烷基三硫代碳酸酯基)-2-甲基丙酸发生酯化反应,制备能够引发可逆加成-断裂链转移自由基(RAFT)聚合的纳米粒子(SiO_2-CTA),再以此作为大分子链转移剂,引发异戊二烯单体发生RAFT聚合,得到SiO_2-g-PIP。采用傅立叶红外光谱(FTIR)以及热失重分析(TGA)测试表明,运用RAFT聚合的方法成功地将聚异戊二烯接枝到纳米SiO_2的表面,接枝量为2.1%(wt)。将SiO_2-g-PIP通过混炼的方式引入到SBS弹性体中,扫描电子显微镜(SEM)表征结果表明纳米粒子接枝PIP后在材料中的分散性提高,材料的力学性能也有明显提高。
In this contribution, we reported the investigation of SBS reinforcd by silicon dioxide-graft-polyisoprene core-shell nanoparticle (SiO2-g-PIP). First, the hydroxyl on the surface of SiO2 nanoparticles was reacted with 2-methyl-2-propanoic acid to afford a trithioester-capped SiO2(denoted). SiO2-CTA used as the nanoparticles chain transfer agent, SiO2-g-PIP core-shell nanoparticle was synthesized via reversible addition-fragmentation chain transfer polymerizations (RAFT). The results of FTIR spectroscopy and TGA showed that the grafting weight of PIP block in SiO2-g-PIP is 2.1wt%. Then, SiO2-g-PIP and SiO2 were simultaneously incorporated into SBS. The results of scanning electron microscope (SEM) showed that SiO2 microdomains in SBS/SiO2-g-PIP composite had much better dispersion and distribution than SiO2 in SBS/SiO2 composite. It is the filler-rubber interaction of SBS/SiO2-g-PIP composite that endowed the composite with improved mechanical properties.
作者
相益信
沈显荣
高建纲
宋庆平
XIANG Yi-xin;SHEN Xian-rong;GAO Jian-gang;SONG Qing-ping(College of Biological and Chemical Engineering,Anhui Polytechnic University,Wuhu 241000,China)
出处
《高分子通报》
CAS
CSCD
北大核心
2019年第3期43-50,共8页
Polymer Bulletin
基金
安徽工程大学科研启动基金项目(2017YQQ003)
安徽工程大学校级国家基金预研项目(2019yyzr01)
