文献类型：期刊文献

英文题名：Effect of Nano-SiO2 on Granule Characteristic and Fusion Process of Poly(vinyl chloride-co-vinyl acetate)/Nano-SiO2 Composite Resin

作者：Miao, Hui[1,2];Lin, Shaoliang[1];Lin, Jiaping[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China;[2]Shanghai Chlor Alkali Chem Co Ltd, Shanghai 200241, Peoples R China

年份：2014

卷号：20

期号：4

起止页码：230

外文期刊名：JOURNAL OF VINYL & ADDITIVE TECHNOLOGY

收录：;EI(收录号：20151400705667);WOS:【SCI-EXPANDED(收录号:WOS:000344350100005)】；

基金：This work was supported by the National Natural Science Foundation of China (51103044 and 50925308). Support from the Project of Shanghai Municipality (11QA1401600) is also appreciated.

语种：英文

外文关键词：Impact strength - Polyvinyl chlorides - Scanning electron microscopy - Mixtures - Organic pollutants - Silica - Morphology - Particles (particulate matter) - Granulation - Tensile strength - Porosity - Chlorine compounds - Suspensions (fluids)

摘要：Poly(vinyl chloride-co-vinyl acetate) (PVVA)/nano-SiO2 composite resin was prepared by radical suspension polymerization of the monomers in the presence of fumed nano-SiO2 particles premodified with gamma-methylacryloxypropyl trimethoxysilane. The cool dioctyl phthalate absorption percentage, granule porosity, and specific surface area of the composite resin were enhanced through incorporation of nano-SiO2 into the PVVA. Scanning electron microscope pictures showed the resin had higher porosity. PVVA/nano-SiO2 composite resin was mixed with pure PVC resin to form a mixture sample (polymer-composite blend [PCB]) and the mixture was fused in the torque rheometer. The rheological test results indicated that, at a certain nano-SiO2 content, the fusion speed of PCB was accelerated and the fusion temperature of PCB was decreased, owing to nano-SiO2 dispersed evenly in the polymer matrix. When excessive nano-SiO2 was loaded, the fusion torque, the fusion time, and the fusion temperature of PCB were all increased. These properties are correlative to the dispersive density of nano-SiO2 in the polymer matrix. This study also demonstrated that the introduction of small amounts of nano-SiO2 into the resin increased the impact strength and tensile strength of PCB simultaneously. (c) 2014 Society of Plastics Engineers