可反应性纳米SiO_2对PVC颗粒结构、性能的影响  

Influences of reactive nano-SiO_2 on the structure and properties of PVC particles

作　　者：田爱娟[1] 李小红[2] 马军营[2] 张治军[2] 

机构地区：[1]天津渤天化工有限责任公司,天津300480 [2]河南大学特种功能材料教育部重点实验室,河南开封475004

出　　处：《聚氯乙烯》2010年第8期19-22,共4页Polyvinyl Chloride

基　　金：国家高技术研究发展计划(863计划)(课题编号2009AA03Z326)~~

摘　　要：以VCM和可反应性纳米SiO2(RNS)为原料,采用原位聚合方法合成了PVC/RNS复合材料,考察了RNS对PVC树脂颗粒结构和性能的影响,并利用FTIR和XPS等分析了RNS与PVC之间的相互作用机制。结果表明:①PVC/RNS颗粒内部结构较为疏松多孔,可见较多的初级粒子;②与PVC树脂相比,PVC/RNS复合材料的黏数略有增加,增塑剂吸收量提高,表观密度略有降低,颗粒粒度分布变化不大,维卡软化温度小幅增加,热降解速率降低;③RNS与部分PVC分子链之间形成了强化学键结合。Using VCM and reactive nano-SiO2 （RNS） as raw materials, PVC/RNS composites were synthesized through in-situ polymerization. Influences of RNS on the structure and properties of PVC particles were investigated, and the interaction mechanism of RNS with PVC was analyzed by FTIR and XPS. The results show that： （1） the internal structure of PVC/RNS particles is por- ous and there are many primary particles; （2） compared with PVC resin, PVC/RNS composites show a little increase in viscosity number, an improvement in the adsorption amount of plasticizer, a little decrease in apparent density, little change in particle size distribution, a small increase in Vi- cat softening temperature and a decrease in the rate of heat-degradation; （3） strong chemical bonds are formed between RNS and partial PVC molecular chains.

关 键 词：可反应性纳米二氧化硅 PVC 颗粒结构 性能 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]