LLDPE-g-AA的流变行为及力学性能  

RHEOLOGICAL BEHAVIOR AND MECHANICAL PROPERTIES OF LINEAR LOW DENSITY POLYETHYLENE GRAFTED ACRYLIC ACID

作　　者：姚占海[1] 黄宏亮[1] 殷敬华[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理实验室,130022

出　　处：《现代塑料加工应用》2000年第6期14-16,共3页Modern Plastics Processing and Applications

基　　金：国家自然科学基金(598730 2 2 ); 973计划(G199906480 6 )资助项目

摘　　要：利用毛细管流变仪研究了线性低密度聚乙烯接枝丙烯酸 (LLDPE - g -AA)的流变行为。结果表明 ,在高的剪切应力下LLDPE -g -AA的表观粘度比纯LLDPE的小 ,并改进了树脂的流动性和加工性。LLDPE - g -AA的表观粘度随接枝丙烯酸含量的增加而降低 ,说明接枝到LLDPE分子链上的丙烯酸起到了内润滑剂的作用。利用Instron 112 1拉力机测试了LLDPE - g -AA的力学性能 ,结果表明其拉伸强度。The rheological properties of LLDPE-g-AA were studied with a capillary rheometer. At high shear stress,apparent viscosity of LLDPE-g-AA was lower than that of LLDPE,hence,the melting flow ability and processing property was improved. Apparent viscosity of LLDPE-g-AA decreased with increas of degree of grafting, due to the monomer grafted onto LLDPE molecular chains acting as an interlubrication agent. Mechanical properties of LLDPE-g-AA were tested by Instron 1121 test machine. Comparing with pure LLDPE, no obvious changes could be found in its tensile strength, young's modulus and elongation at break.

关 键 词：线性低密度聚乙烯 流变行为 力学性能 丙烯酸接枝共聚物 

分 类 号：TQ320.1[化学工程—合成树脂塑料工业]