PVDF/DBP/DOP/TiO_2体系流变性能研究  

Study on Rheology Properties of PVDF/DBP/DOP/TiO_2 System

作　　者：张召才[1] 郭春刚[1] 李晓明[1] 刘国昌[1] 关毅鹏[1] 吕经烈[1] 

机构地区：[1]国家海洋局天津海水淡化与综合利用研究所,天津300192

出　　处：《塑料科技》2012年第2期36-39,共4页Plastics Science and Technology

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(K-JBYWF-2010-G14)

摘　　要：以聚偏氟乙烯(PVDF)为原料,邻苯二甲酸二丁酯(DBP)/邻苯二甲酸二辛酯(DOP)为复合稀释剂,纳米TiO2为添加剂,采用转矩流变仪,研究了PVDF/DBP/DOP/TiO2共混体系的流变性能。结果表明:PVDF/DBP/DOP/TiO2共混体系的表观黏度随剪切速率的升高而降低,属于切力变稀流体;随着温度的提高,其非牛顿性变弱,结构化程度降低;其中纳米TiO2可起填充作用,使共混物黏度提高,流动性变差;DBP/DOP主要起软化增塑PVDF的作用,减弱共混物内高分子链间的相互牵制,使共混体系黏度下降,非牛顿性减弱,流动性增强。The PVDF/DBP/DOP/TiO2 blending system was prepared with PVDF as raw material,DBP/DOP as composite thinner and nano-TiO2 as additive,and then the rheology behavior of PVDF/DBP/DOP/TiO2 system was studied by use of torque rheometer.The results show that： the apparent viscosity of PVDF/DBP/DOP/TiO2 system decreases with the increasing of shearing rate,it is shear thinning fluid.The non-Newtonian index increases and the structural viscosity index decreases with the increase of temperature.The filling effect of nano-TiO2 makes viscosity of blending system improve and the fluidity decrease.The DBP/DOP has softening and plasticization effect on PVDF,and then the interaction between polymer chains in blends weakens,viscosity and non-Newtonian behavior decrease and the fluidity of the system increases.

关 键 词：聚偏氟乙烯 流变性能 剪切弹性模量 切力变稀 最大松弛时间 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]