The emulsion copolymerization of acrylates(methylmethacrylate,bulylacrylate acry lic acid,hydroxyethylmethacrylate) and vinyltriethoxysilane(VTS) using a reactive emulsifier DNS-86 has been studied as function of emul...The emulsion copolymerization of acrylates(methylmethacrylate,bulylacrylate acry lic acid,hydroxyethylmethacrylate) and vinyltriethoxysilane(VTS) using a reactive emulsifier DNS-86 has been studied as function of emulsifier a mount, initiator amount, VTS amount, HEMA amount and polymerization temperature. The results showed that the monomer conversion i ncreased with increase in emulsifier amount, initiator amount , amount of HEMA monomer and reaction temperature, but decreased w ith increase in the amount of VTS monomer.展开更多
文摘采用种子乳液聚合,引入乙烯基三甲氧基硅烷(A-171),以十二烷基苯磺酸钠(DSB)和壬基酚聚氧乙烯(20)醚(OP-10)作复合乳化剂,以过硫酸钾(KPS)为引发剂,在反应温度为78±2 ℃条件下,合成了A-171改性醋酸乙烯酯(VAc)-丙烯酸酯共聚乳液.实验采用单体滴加工艺,考察了配方中丙烯酸丁酯(BA)、甲基丙烯酸(MAA)和A-171用量对共聚物性能和乳液聚合过程的影响,并用红外光谱仪(FTIR)、粒度仪和差示量热扫描仪(DSC)对共聚物的结构及性能进行了表征.结果表明,引入w(BA)=10%～15%(相对于配方中单体总质量,下同)、w(MAA)=4%、w(A-171)=1%到VAc -丙烯酸酯共聚物乳液中,共聚物乳液涂膜的吸水率<5.0%,耐寒性通过10个循环,60 ℃加速贮存稳定性>100 d.
文摘The emulsion copolymerization of acrylates(methylmethacrylate,bulylacrylate acry lic acid,hydroxyethylmethacrylate) and vinyltriethoxysilane(VTS) using a reactive emulsifier DNS-86 has been studied as function of emulsifier a mount, initiator amount, VTS amount, HEMA amount and polymerization temperature. The results showed that the monomer conversion i ncreased with increase in emulsifier amount, initiator amount , amount of HEMA monomer and reaction temperature, but decreased w ith increase in the amount of VTS monomer.
