摘要
以过硫酸铵为引发剂,亚硫酸氢钠作链转移剂,由巴豆酸(CA)、甲基丙烯磺酸钠(SMS)、巴豆酸甲酯(MC)为单体合成共聚物CA-SMS-MC。通过单因素实验研究了过硫酸铵用量、反应温度对纳米二氧化硅分散液黏度的影响,正交实验结果表明最佳合成条件为:反应温度为90℃,反应时间是2.5 h,过硫酸铵为0.01 g(w=0.05%)、亚硫酸氢钠为0.1 g(w=0.50%)、单体质量为1.1 g(w=5.5%)、单体物质的量比4∶1∶2,红外分析表明该聚合物为CA-SMS-MC共聚物钠盐,此外,还进行了GPC、扫描电镜、粒径分布等测试。当共聚物的用量为0.5 g(w=0.60%)时,对纳米二氧化硅分散液的分散效果最好。
A CA-SMS-MC copolymer for nano-silica dispersion liquid is synthesized by using crotonic acid （CA）, methyl allyl sulfonate （SMS） and methyl crotonate （MC） as mon- omer, ammonium persulfate as initiator and sodium bisulfite as chain transfer agent. The or- thogonal experiment is used to investigate the effects of concentration of ammonium persulfate and reaction temperature on the viscosity of nano-silica dispersion liquid and the effects of the reaction time on the dispersity. The results determine the optimal synthesizing conditions： re- action temperature of 90 ℃, reaction time of 2.5 h, composition comprising ammonium per- sulfate 0. 05%, sodium bisulfite 0. 47% and monomers 5.4%, wherein the monomer ratio is 4 ： 1：2. The FT-IR shows that the polymer is a copolymer sodium salt of CA-SMS-MC, in ad- dition, the GPC, SEM and PSD were used to characterize the copolymer. The results show that the lower viscosity and better dispersity of nano-silica dispersion liquid are obtained when the copolymer is 0. 60%.
出处
《涂料工业》
CAS
CSCD
北大核心
2014年第4期29-35,共7页
Paint & Coatings Industry
