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机械性质和非同热结晶聚酸修饰的多烯酸弹性体和纤维素纳米晶体的多乳酸动力学

Weixiao Meng¹, Xiaojie Zhang¹, Xiuli Hu¹

¹Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China.

|September 28, 2023

概括

这项研究合成了聚乙烯酸-甲基甲酸-甘甲酸 (PBMG),并将其与纤维素纳米晶体 (CNC) 结合起来,以增强聚乳酸 (PLA) 特性. 添加1%重量的CNC显著提高了PLA的质量.

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
纳米技术纳米技术

背景情况:

聚乳酸 (PLA) 是一种可生物降解的聚合物,具有潜在的应用,但机械性能有限.
提高PLA的机械和结晶性质对于更广泛的工业采用至关重要.
聚烯弹性体和纤维素纳米晶体为聚合物复合材料的开发提供了可调节的特性.

研究的目的:

为了合成一种新型的多烯弹性体乳,聚乙烯酸-甲基甲烯酸-糖甲烯酸 (PBMG).
研究将PBMG和纤维素纳米晶体 (CNC) 纳入聚乳酸 (PLA) 混合物的机械和非异热结晶动力学的影响.
分析CNC在修改PLA结晶行为的作用.

主要方法:

用种子乳液聚合来合成PBMG核心外乳.
制备了PBMG/CNC分散物并与PLA混合,以创建复合材料.
差分扫描热量计 (DSC) 和修改的阿弗拉米方程 (Jeziorny,Ozawa,Mo) 用于研究非异热结晶动力学.
极化显微镜被用来观察结晶形态.

主要成果:

添加PBMG和PBMG/CNC混合物显著改善了PLA矩阵的机械性能.
非同热结晶分析显示,1重%的CNC含量大大增加了PLA的整体结晶率.
增强的结晶率归因于增加的核密度和加快的聚合物细分移动由CNC诱导.
极化显微镜证实了核和结晶加速的增加.

结论:

聚乙烯酸-甲基甲基甲基甲基甲基酸 (PBMG) 和纤维素纳米晶体 (CNC) 是增强聚乳酸 (PLA) 特性的有效添加剂.
低度的CNC (1重量%) 通过促进核化,显著加快了PLA的非异热结晶.
这些发现表明,开发高性能,可生物降解的基于PLA的复合材料是一个有希望的途径.

关键词:

纤维素纳米晶体的纤维素纳米晶体.制造技术的制造技术是什么非异热晶体化动力学非异热晶体化动力学多烯酸弹性体的多烯酸弹性体多乳酸多乳酸是什么意思

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