通过卡达诺尔诱导的兼容性增强,提高聚乳酸/聚烯碳酸混合物的性能
Lixin Song1, Weihan Chi1, Yongsheng Hao2
1Polymer High Functional Film Engineering Research Center of Liaoning Province, Shenyang University of Chemical Technology, Shenyang, Liaoning 110142, China; College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
International journal of biological macromolecules
|December 23, 2023
概括
卡达诺 (CD) 通过作为反应性兼容剂来增强聚乳酸 (PLA) 和聚烯碳酸盐 (PPC) 混合物. 这提高了兼容性,光学性能,并显著提高了性和破裂时的延长.
科学领域:
- 聚合物科学 聚合物科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 聚乳酸 (PLA) 和聚烯碳酸 (PPC) 是广泛使用的可生物降解聚合物.
- 混合PLA和PPC可以提高材料性能,但兼容性问题经常出现.
- 生物基脂卡尔达诺 (CD) 被探索为一种潜在的兼容剂.
研究的目的:
- 研究卡达诺 (CD) 作为反应兼容剂对PLA/PPC混合物的作用.
- 系统地分析CD对热,光学,学和机械性能的影响.
- 阐明CD与PLA/PPC之间的反应机制及其对混合物形态的影响.
主要方法:
- 制备不同CD含量的PLA/PPC/CD混合物 (70/30 w/w的PLA/PPC基).
- 综合性表征包括热分析 (DSC),光学测量 (透射率,不透明度),风学,机械测试 (破裂时的延长,冲击强度) 和显微镜 (形态学).
- 对反应机制和共聚合物形成的分析 (PLA-b-CD-b-PPC).
主要成果:
- CD有效地使PLA和PPC兼容,形成一个块共聚合物结构 (PLA-b-CD-b-PPC).
- 在 8 个重量% 的 CD 达到完整的可混合性,用单个玻璃过渡温度 (Tg) 表示.
- 改进的光学特性:高光传导率 (>92%) 和减少不透明度 (降至~24%).
- 机械性能显著提升:在6-8%重量度CD之间观察到脆性-柔性过渡,在12%重量度CD时达到峰值性 (破裂时延长513.24%,冲击强度9211.5 J/m2).
- 在加工条件下对热稳定性没有负面影响;在极端条件下得到改善.
结论:
- 卡达作为PLA/PPC混合物的有效反应兼容剂,创造了一个完全兼容的系统.
- 添加CD显著提高了PLA/PPC混合物的光学清晰度和机械性.
- 开发的PLA/PPC/CD混合物为具有定制性质的先进生物降解材料提供了一个有前途的途径.
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