摘要
为了比较填料种类及尺寸对聚乳酸(PLA)结晶行为的影响,选用硫酸钙晶须(CS)、滑石粉(talc)、湿法云母(mica)、蒙脱土(mmt)、针状硅灰石(W)、高岭土(Kaolin)、纳米碳酸钙(nCC)和微米碳酸钙(mCC)为填料,通过熔融共混方法制备了不同填充PLA复合材料,并采用DSC对比研究了PLA和不同PLA复合材料的冷结晶和熔体结晶的结晶与熔融行为。实验结果表明,PLA的结晶与熔融温度、结晶度、等温结晶速率常数等取决于填料的类型。不同填料加入对聚乳酸结晶与熔融行为产生不同的影响,形成不同晶体而呈现不同的熔融行为。
In order to investigate the effect of different fillers on the crystallization behavior of Polylactic acid(PLA),PLA composites with calcium sulfate whisker(CS),talc,mica,montmorillonite(mmt),wollastonite(W),kaolin,nano calcium carbonate(nCC),micron calcium carbonate(mCC)were prepared by melting compounding.DSC was then exploited on cold crystallization and melt crystallization behaviors of PLA and its composites.The result indicates that types of fillers determine greatly composites of PLA on crystallization temperature,melting temperation,crystallization degree and isothermal crystallization rate.With different fillers,composites of PLA show varied behaviors of crystallization.Varied types of crystals then formed,result in different melting curves.
作者
杨岳文
麦堪成
YANG Yue-wen;MAI Kan-cheng(Huntsman Textile Effect(China)Co.Ltd.Guangzhou 511447,China;Materials Science Institute,School of Chemistry,Sun Yat-sen University//Key Laboratory of Polymeric Composites and Functional Materials of Ministry of Education//Guangzhou Provincial Key Laboratory of High Performance Resin-based Composites,Guangzhou 510275,China)
出处
《南宁师范大学学报（自然科学版）》
2020年第4期92-101,共10页
Journal of Nanning Normal University：Natural Science Edition
关键词
聚乳酸
无机填料
冷结晶
熔融结晶
polylactic acid
inorganic fillers
cold crystallization
melt crystallization
