共聚PP及PP/CaCO_3高填充体系的流变行为研究  

Rheology and Dispersion Behavior of P ropylene-Ethylene Copolymer and Highly FilledP ropylene-Ethylene Copolymer/Calcium Carbonate Composites

作　　者：马万武[1] 郎丰正[2] 王兆波[2] 

机构地区：[1]中国石化青岛石油化工有限责任公司检验中心,青岛266043 [2]青岛科技大学材料科学与工程学院,青岛266042

出　　处：《塑料制造》2011年第8期63-66,共4页Plastics Manufacture

摘　　要：以双螺杆挤出机制备了共聚PP/CaCO_3高填充复合材料,表征了CaCO_3粒子在基体中的分散行为,并对共聚PP及复合体系的流变行为进行了研究。结果表明:纯共聚PP的熔体呈现出明显的假塑性流体行为,提高熔体温度,熔体的弹性有所增强;高填充共聚PP/CaCO_3复合体系及高填充共聚PP/HDPE/CaCO_3复合体系的熔体的剪切行为与纯共聚PP的类似,高填充的CaCO_3粒子仅对共聚熔体的表观粘度产生轻微影响;共聚PP中大量存在的CaCO_3粒子,降低了熔体的假塑性行为;提高剪切速率是调节高填充共聚PP/HDPE/CaCO3_复合体系粘度的有效手段。The rheology and dispersion behavior of commercial propylene-ethylene copolymer, highly filled propylene-ethylene copolymer/CaCO3 composites and highly filled propylene-ethylene copolymer/HDPE/CaCO3 composites prepared by melt-compounding were investigated. The pure propylene- ethylene copolymer exhibits pseudoplastic flow behavior obviously. The CaCO3 particles in the composites have achieved a homogeneous dispersion and the increasing shear rate has almost no influence on the dispersion behavior of CaCO3 particles. The high loading of CaCO3 particles influences the rheology behavior of propylene-ethylene copolymer slightly. For the highly filled propylene-ethylene copolymer/CaCO3 composites, the extensional viscosity only decreases slightly throughout the entire range of extension rates.

关 键 词：共聚PP CACO3 高填充复合材料 分散 流变 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]