摘要
从复合材料的界面设计出发,分别采用聚醚型聚氨酯(PUR)预聚体和硅烷偶联剂KH-560来处理玻璃纤维(GF),制备了相应的GF增强聚乳酸(PLA)复合材料,对其界面及力学性能进行研究。结果表明,经聚醚型PUR预聚体处理过的GF能显著提高PLA的缺口冲击强度,当GF质量分数为20%时,复合材料的缺口冲击强度和拉伸强度分别比纯PLA提高111.9%和51.9%;扫描电子显微镜表明,经聚醚型PUR预聚体处理过的GF与PLA基体形成了良好的柔性界面层,相比于硅烷偶联剂处理后的刚性粘接界面,这种柔性界面能有效改善PLA的脆性。
Starting from interfacial design of composite materials,by using glass fiber treated with both polyurethane（PUR） prepolymer and silane coupling agent KH-560,two kinds of PLA/GF composite materials were prepared.The mechanical properties and interface were studied.Results showed that the notched impact strength of the composite was sharply enhanced with PUR prepolymer modified glass fiber as reinforcement.Notched impact strength and tensile strength were increased by 111.9% and 51.9% at 20wt% GF content compared with that of the original.SEM result showed that the flexibly interlayer was formed between PLA and GF modified by PUR prepolymer.The flexibly interlayer could ameliorate the brittleness of PLA more than the hard interface formed by PLA and GF modified by silane coupling.
出处
《工程塑料应用》
CAS
CSCD
北大核心
2010年第4期25-29,共5页
Engineering Plastics Application
基金
江苏省高校"青蓝工程"科技创新团队资助项目(2008-04)
关键词
聚乳酸
聚氨酯预聚体
界面改性
玻璃纤维
polylactic acid
polyurethane prepolymer
interfacial modification
glass fiber
