碳酸钙填充对PVC增塑糊黏度的影响  

Viscosity and Aging Process of CaCO_3 Filled Polyvinyl Chloride Plastisols

作　　者：吉玉碧[1,2] 徐国敏[2] 杨照[2] 罗恒[2] 谭红[1,3] 

机构地区：[1]北京化工大学理学院,北京100029 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014 [3]贵州科学院,贵州贵阳550001

出　　处：《高分子材料科学与工程》2016年第2期54-59,共6页Polymer Materials Science & Engineering

基　　金：白科合同[2014]29号;国家科技支撑计划(2007BAE10B03)

摘　　要：文章研究了碳酸钙(CaCO_3)未填充和填充情况下,3种不同生产方法、相近聚合度的聚氯乙烯(PVC)糊树脂在对苯二甲酸二辛脂(DOTP)和乙酰柠檬酸三正丁酯(ATBC)2种增塑体系中的黏度性能,以及黏度性能与增塑糊中粒子颗粒形态关系。结果表明,无论CaCO_3填充与否,增塑糊黏度在DOTP体系下均比ATBC的大,主要与增塑剂分子结构有关;未填充CaCO_3时,增塑糊黏度性能主要受PVC糊树脂和增塑剂间相容性的影响,3种糊树脂与DOTP的相容性均比ATBC的好;填充CaCO_3后,几种增塑糊黏度均增大,黏度性能主要受相容性和树脂与CaCO_3粒子颗粒形貌的共同影响。The viscosity and its aging process of unfilled and calcium carbonate（CaCO_3） filled polyvinyl chloride（ PVC） plastisols were investigated comparatively by vibrational viscometry,and the morphology of the PVC resins employed and of the plastisols prepared was observed by scanning electron microscopy. The results indicate that the viscosity of the dioctyl terephthalate based plastisols is higher than that of the acetyl tributyl citrate based plastisols,no matter whether the CaCO_3 filled or not. It is mainly on account of the different molecular structures between the two plasticizers. Moreover,the viscosity of unfilled plastisols is mainly determined by the compatibility between plasticizer and PVC particles,but the viscosity of filled plastisols is determined by the compatibility and particle morphology simultaneously.

关 键 词：聚氯乙烯 碳酸钙 黏度 相容性 颗粒形态 

分 类 号：TQ325.3[化学工程—合成树脂塑料工业]