摘要
采用母料法即通过连续混炼机和双螺杆挤出机分别制备了纳米碳酸钙(nano-CaCO_3)母料,后将母料按照一定配比添加到聚乳酸(PLA)树脂中进行注塑。通过热重分析仪、扫描电子显微镜和旋转流变仪等对复合材料进行了分析表征,探讨了母料法加工工艺对nano-CaCO_3在PLA树脂中分散的影响。结果表明,连续混炼机制备的母料更有利于nano-CaCO_3在PLA基体中分散,降低复合材料复数黏度、提高结晶度;同时当添加母料含量相同时,连续混炼母料对复合材料拉伸强度"损失"程度更低,对缺口冲击强度"补强"程度更高。
Nano-CaCO3 masterbatch was prepared by using continuous mixer and twin-screw extruder and then were added to polylactic acid (PLA) for injection molding. The effect of processing methods of the masterbatch on the dispersion of Nano-CaCO3 in the PLA matrix was investigated by thermogravimetric analysis, scanning electron microscopy and rotational rheometer. The results indicated that the masterbatch prepared by a continuous mixing method was more advantageous to the dispersion of Nano-CaCO3 in the PLA matrix, which could reduce the complex viscosity of the compounds and increase their crystallinity. At the same amount of masterbatch, the compounds obtained a less decrease in tensile strength but a more significant reinforement effect when using the masterbatch prepared by a continuous mixing method.
作者
童鹏程
杨松伟
钱庆荣
陈庆华
谢一督
肖荔人
TONG Pengcheng;YANG Songwei;QIAN Qingrong;CHEN Qinghua;XIE Yidu;XIAO Liren(College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China;Engineering Research Center of Polymer Green Recycling of Ministry of Education,Fuzhou 350007,China)
出处
《中国塑料》
CAS
CSCD
北大核心
2019年第3期68-73,86,共7页
China Plastics
基金
清远市科技计划项目(2017D003)
省科技厅项目(2018Y4002)
关键词
聚乳酸
连续混炼机
双螺杆挤出机
纳米碳酸钙母料
poly(lactic acid)
continuous mixer
twin-screw extruder
nano-calcium carbonate masterbatch
