摘要
选用甲基丙烯酸缩水甘油酯接枝乙烯辛烯共聚物(POE-GMA)和聚乳酸、木粉在Haake转矩流变仪中熔融共混。通过拉伸、冲击、差示扫描量热、扫描电镜等测试方法对共混复合材料的性能进行了研究。结果表明:聚乳酸木塑复合材料的拉伸强度和弯曲性能随POE-GMA添加量的增加而减小;POE-GMA的加入使聚乳酸木塑复合材料的结晶温度下降,结晶度升高;当m(PLA)∶m(WF)∶m(POE-GMA)=80∶20∶20时,复合材料的表面自由能最低,接触角最大,吸水性最低;随着木粉含量的增加,复合材料的起始热降解温度降低,POE-GMA的含量增加对聚乳酸木塑复合材料的起始热降解温度影响不大。
Glycidyl methacrylate-g-ethylene-octene copolymer (POE-GMA) and wood flour (WF) were blended with polylactic acid(PLA) in Haake mixer. The properties of the PLA-WF composites were inves- tigated using tensile strength, impact strength, differential scanning calorimetry(DSC) and scanning elec- tronic microscopy(SEM). Results showed that the tensile strength and flexural capability of PLA-WF composites decreased with the increasing of POE-GMA content. The crystallization temperature of PLA- WF composites decreased and crystallinity increased by adding POE-GMA. When m(PLA) : m(WF) : m(POE-GMA) was 80 : 20 : 20, the surface free energy reached the lowest and the surface contact angle reached the highest values. The addition of POE-GMA had little effect on the initial temperature of ther- mal degradation of the PLA.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2013年第1期50-54,共5页
Journal of Functional Polymers
基金
国家科技支撑计划(2012BAD32B01)
上海市优秀技术带头人计划(12XD1420400)
关键词
复合材料
聚乳酸
结晶
降解
composites
poly(lactic acid)
toughening
crystallization
degradation