混合PLA//PBAT混合混合物的相互作用,结构和特性
Emese Pregi1,2, Imre Romsics1,2, Róbert Várdai1,2
1Laboratory of Plastics and Rubber Technology, Department of Physical Chemistry and Materials Science, Faculty of Chemical Technology and Biotechnology, Budapest University of Technology and Economics, Műegyetem rkp. 3, H-1111 Budapest, Hungary.
Polymers
|August 12, 2023
概括
将聚乙烯基酸盐-协同甲酸盐 (PBAT) 添加到聚乳酸 (PLA) /木质素混合物中并没有改善兼容性. 酸的添加使混合物特性,特别是可变形性恶化,这表明需要反应性加工才能在这些混合材料中获得更好的性能.
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
- 生物复合材料是一种生物复合材料.
背景情况:
- 聚乳酸 (PLA) 和素混合物表现出显著的刚性和脆性.
- 聚乙烯基酸盐-协同甲酸盐 (PBAT) 作为PLA/木质素系统的潜在修饰剂正在研究中.
研究的目的:
- 调查PBAT添加对PLA/石灰混合物的特性和结构的影响.
- 为了评估成分相互作用和基无水化物移植的PLA作为合剂的有效性.
- 了解这些混合聚合物混合物的结构-性质关系.
主要方法:
- 通过同质化和压缩成型制备两组和三组混合物.
- 使用可溶性参数和热分析分析组件相互作用的分析.
- 通过拉伸试验对机械性能进行表征.
- 使用扫描电子显微镜 (SEM) 和数字光学显微镜 (DOM) 的微结构分析.
主要成果:
- PBAT和红素与其他成分的相互作用略强于PLA.
- 马氏无水化物移植的PLA作为合剂是无效的,无法修改相互作用.
- 混合物是不混合的和异质的,红素主要位于PBAT阶段.
- 相互透的网状结构和相位逆转发生在特定的PBAT度范围内 (30-60体积%).
- 添加素对混合物特性产生了负面影响,特别是可变形性.
结论:
- 由于PLA,PBAT和素的固有不混合性,因此通过简单的混合来提高性能是有限的.
- 素的加入会对混合物的机械性能产生不利影响,尤其是柔性.
- 反应性加工策略是必要的,以提高兼容性,并实现基于素的混合混合混合物的理想性质.
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