聚乳酸复合材料性能研究+文献综述
毕业论文关键词：聚乳酸；聚乙二醇；芳纶纤文；力学性能；断面形貌
Abstract
The object of the polylactic acid (PLA), polyethylene glycol (PEG), aramid fiber as raw material, by melt blending, molded composites prepared PLA/PEG6000, PLA/PEG2 Wan composite materials and PLA / Kevlar fiber composite materials, using a universal testing machine, Charpy impact test machine, Vicat heat distortion tester, melt flow rate, scanning electron microscopy tensile properties of the samples, impact resistance, heat distortion temperature, melt flow and fracture surface characterization. Performance results show that: PEG is added to improve the toughness of PLA, to improve the mobility in the molten state, but the tensile strength of PLA / PEG composites decreases, reducing the heat distortion temperature; aramid fiber is added to improve the pull-PLA tensile strength, when loaded than the fiber is 1%, the melt index up to 12.8g/min. By loading different types of additives modified PLA, to expand its scope of application to a certain extent.
KeyWords：polylatic acid；polyethylene glycol；aramid fiber；mechanical property；fracture appearance
目录
1 绪论 1
1.1 课题研究背景及意义 1
1.2 聚乳酸概述和研究现状 2
1.2.1 聚乳酸概述 2
1.2.2 聚乳酸的现状 4
1.3 增韧聚乳酸的方法 6
1.3.1 通过改变微观分子结构进行增韧改性 6
1.3.2 通过改变宏观物质组成进行增韧改性 7
1.3.3 通过复合进行增韧改性 8
1.4 增强聚乳酸的方法 9
1.5 聚乳酸管材的挤出工艺 9
1.5.1 反应挤出法制备 9
1.5.2 振动力场下动态制备 10
1.5.3 低温挤出成型制备 11
1.6 聚乳酸的应用发展前景 11
1.7 课题研究内容 12
2 实验部分 13
2.1 实验原料 13
2.2 主要仪器和设备 13
2.3 配方设计 14
2.3.1 PEG的添加对PLA复合材料力学性能的影响 14
2.3.2 芳纶纤文的添加对PLA复合材料力学性能的影响 14
2.4 试样制备工序 14
2.4.1 聚乳酸增韧材料的熔融共混制备及注塑成型 14
2.4.2 聚乳酸增强材料的熔融共混制备及模压成型 15
2.5 聚乳酸复合材料的性能测试 16
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