PVA/nano-SiO_2原位聚合薄膜性能的研究  

Study on Properties of PVA/nano-SiO_2 Hybrid Film

作　　者：贾宁宁[1] 高延敏[1] 朱斌[1] 陶正章[1] 周超[1] 

机构地区：[1]江苏科技大学,先进焊接技术省级重点实验室,江苏镇江212003

出　　处：《现代塑料加工应用》2013年第2期18-21,共4页Modern Plastics Processing and Applications

基　　金：江苏省研究生科研创新基金(CX07S_024Z)资助

摘　　要：采用溶胶-凝胶与原位聚合技术,制备了不同纳米二氧化硅(nano-SiO_2)含量的聚乙烯醇/二氧化硅(PVA/SiO_2)杂化薄膜。研究了纳米颗粒的引入对PVA/SiO_2薄膜热学和力学性能的影响。结果表明:SiO_2含量较低时只降低PVA/SiO_2结晶度,而含量较高时结晶度和结晶尺寸均降低;SiO_2的加入拓宽了PVA的玻璃化转变温度(T_g)范围,提高了PVA的热稳定性;PVA/SiO_2的拉伸强度、拉伸模量得到增强,而断裂伸长率则呈下降趋势。SiO_2质量分数为5%时,PVA/SiO_2薄膜的综合性能最佳。Polyvinyl alcohol/silica（PVA/SiOe） hybrid film materials with different nano-SiO2 content were prepared by sol-gel and in-situ polymerization technology. The influence of nano-SiOz on the thermal and mechanical properties of PVA/SiO2 was stud- ied. The results show that crystallinity decreases with the decreasing of content of SiO2, but both crystallinity and srystallite size decrease with the increasing of content of SLOE; with the addition of SiO2, the glass transition temperature（Tg） range of PVA/SiO2 is broadened and the thermal stability is improved. The tensile strength and tensile modu- lus of PVA/SiO2 are improved, but elongnation at break is decreased. The performance of PVA/SiO2 is excellent when the mass ratio of SiO2 is 5%.

关 键 词：原位聚合 溶胶-凝胶 聚乙烯醇二氧化硅杂化 薄膜 力学性能 

分 类 号：TB383.2[一般工业技术—材料科学与工程]