聚乳酸-木粉-甲基丙烯酸缩水甘油酯接枝乙烯辛烯共聚物复合材料的制备及性能

张桂新; 李冰; 钱建华; 曹二平; 于云安; 郭卫红

聚乳酸-木粉-甲基丙烯酸缩水甘油酯接枝乙烯辛烯共聚物复合材料的制备及性能

Preparation and Performance of Poly(lactic acid)Wood FlourGlycidyl Methacrylate-g-EthyleneOctene Copolymer Composites

摘要

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。

Abstract: 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 investigated using tensile strength, impact strength, differential scanning calorimetry(DSC) and scanning electronic 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 thermal degradation of the PLA.

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