体积拉伸形变对PLA／PBS共混物结构与性能的影响  

Effect of Volume Elongational Deformation on Structure and Properties of PLA/PBS Blends

作　　者：唐海龙[1] 陈惠灼[1] 徐文华[1] 杨智韬[1] 

机构地区：[1]华南理工大学聚合物新型成型装备国家工程研究中心,华南理工大学聚合物成型加工工程教育部重点实验室,广东广州510640

出　　处：《塑料工业》2016年第7期43-46,共4页China Plastics Industry

摘　　要：采用基于体积拉伸形变的叶片塑化挤出机与传统单螺杆挤出机分别制备不同组分的聚乳酸/聚丁二酸丁二醇酯(PLA/PBS)原位增强复合材料,并对复合材料的力学性能、热失重行为和微观结构进行研究。结果表明,与单螺杆挤出机加工的复合材料相比,叶片挤出机加工的复合材料具有更加优异的拉伸和冲击性能,后者的冲击强度比前者最大增长70.64%,并且具有更好的热稳定性;扫描电子显微镜照片显示,后者的分散相PLA取向成为纤维棒状结构,并均匀分散于基体中;体积拉伸形变支配的叶片挤出加工可显著提升复合材料的综合性能。The polylactic acid （PLA）/polybutylene succinate （PBS） in-situ reinforced composites with different PLA contents were prepared respectively by vane extruder based on volume elongation rheology and traditional single-screw extruder, and their mechanical and thermal properties and microstructure were investigated in depth. The results show that the PLA/PBS composites prepared by vane extruder have more outstanding tensile and impact and thermal properties than composites prepared by single-screw extruder, and the biggest growth for the impact strength of the former reaches 70. 64%. According to scanning electron microscopic photographs, the PLA dispersed phase is evenly dispersed in the PBS matrix with rod-like structure. The vane extruder based on volume elongation rheology could significantly improve the comprehensive properties of the PLA/PBS composites.

关 键 词：叶片挤出机 原位增强 生物可降解 拉伸形变 共混物 

分 类 号：TB332[一般工业技术—材料科学与工程] TQ317[化学工程—高聚物工业]