摘要
介绍用多步乳液聚合法合成一种R-PVC的新型改性剂—聚丙烯酸丁酯(PBA)/PS/PMMA互穿网络聚合物(简称CSS—ACR—Ⅲ),借助于透射电镜和动态粘弹谱仪考察了CSS—ACR—Ⅲ的形态结构和动态力学性能,并对R-PVC/CSS-ACR-Ⅲ的机械性能、熔融塑化性能和流变性能进行了测定。认为CSS—ACR—Ⅲ具有明显的核壳结构,它能显著改善R-PVC的冲击强度,在改性剂含量为10份时,缺口冲击强度由纯PVC的6.49kJ/m^2提高到27.05kJ/m^2,且基本不影响拉伸、弯曲强度和维卡软化点。此外,CSS-ACR-Ⅲ的加入,能缩短R-PVC的凝胶时间,降低熔体的表观粘度,因而它也是R-PVC的一种良好加工助剂。
A new interpenetrating polymer networks modifier PBA/PS/PMMA (CSS-ACR-Ⅲ, for short) for RPVC was synthesized by multistep emulsion polymerization. The morphology and dynamic mechanical properties of CSS-ACR-Ⅲ were characterized by transmission electron microscope (TEM) and viseoelasticometer, the mechanical properties、melt plasticity and rheological rpoperties of RPVC/CSS-ACR-Ⅲ blend were determined, the results showed CSS-ACR-Ⅲ had obvious core—shell morphology and the impact strength of RPVC could be greatly improved by using CSS-ACR-Ⅲ. In addition, the gelation time of RPVC was shortened and the melt apparent viscosity was also decreased with the use of CSS-ACR-Ⅲ. CSS-ACR-Ⅲ was an ideal processing aid for RPVC.
出处
《塑料工业》
CAS
CSCD
北大核心
1993年第4期44-46,52,共4页
China Plastics Industry
关键词
聚氯乙烯
改性剂
聚丙烯酸酯
LIPN
Latex Interpenetrating Polymer Networks RPVC Modifier Polyacrulates
