合成了含氢聚甲基硅氧烷/聚丙烯酸酯共聚乳液.研究了聚合工艺、配方组成及操作方式对聚合稳定性、动力学、乳液的粒径分布和产物性能的影响.采用部分预乳化单体滴加法(工艺A)和部分纯单体滴加法(工艺B)两种工艺,聚硅氧烷采用高速预乳化...合成了含氢聚甲基硅氧烷/聚丙烯酸酯共聚乳液.研究了聚合工艺、配方组成及操作方式对聚合稳定性、动力学、乳液的粒径分布和产物性能的影响.采用部分预乳化单体滴加法(工艺A)和部分纯单体滴加法(工艺B)两种工艺,聚硅氧烷采用高速预乳化滴加进料方式.用COULTER LS 粒径仪和Nicolet 傅立叶变换红外光谱仪分别测定共聚乳液的粒径分布和产物的结构.研究结果表明,采用A、B两种工艺均能得到平均粒径为0.101~0.103(m的单峰窄分布共聚乳液,并能有效地将含氢聚硅氧烷引入到共聚物大分子中.含氢聚硅氧烷的引入量为3%(质量)时,共聚物涂膜具有柔软、滑爽和强度高等优点.展开更多
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
文摘采用十二烷基硫酸钠(SDS)和聚乙二醇辛基苯基醚(OP乳化剂)组成的复合乳化剂,制备了甲基丙烯酸1,1,5-三氢全氟戊酯(OFPM A)-丙烯酸丁酯(BA)-甲基丙烯酸甲酯(MM A)三元共聚乳液。通过FT-IR、1H-NM R对共聚物进行了表征。对乳液的稳定性、乳胶膜的耐溶剂性进行了研究,用接触角法研究了共聚物膜表面的性质。结果表明,加入含氟丙烯酸酯单体进行共聚合反应时,所得共聚物膜的表面自由能与无氟共聚物膜比较有显著的降低,当含氟单体的加入量达到质量分数为20%时,所得膜的表面自由能降低到25.12 m J/m2。对该含氟膜进行退火处理后,其表面自由能进一步降低到23.52 m J/m2。
文摘合成了含氢聚甲基硅氧烷/聚丙烯酸酯共聚乳液.研究了聚合工艺、配方组成及操作方式对聚合稳定性、动力学、乳液的粒径分布和产物性能的影响.采用部分预乳化单体滴加法(工艺A)和部分纯单体滴加法(工艺B)两种工艺,聚硅氧烷采用高速预乳化滴加进料方式.用COULTER LS 粒径仪和Nicolet 傅立叶变换红外光谱仪分别测定共聚乳液的粒径分布和产物的结构.研究结果表明,采用A、B两种工艺均能得到平均粒径为0.101~0.103(m的单峰窄分布共聚乳液,并能有效地将含氢聚硅氧烷引入到共聚物大分子中.含氢聚硅氧烷的引入量为3%(质量)时,共聚物涂膜具有柔软、滑爽和强度高等优点.
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.
