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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 被引量:1

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