在PVDF/γ-BL系统中通过热诱导相分离的PVDF的多态结晶行为
Florian Gaßdorf1, Zengxuan Fan1, Jan Schwaderer2
1Chair of Technical Thermodynamics and Energy Efficient Material Treatment, Institute for Energy Process Engineering and Fuel Technology, Clausthal University of Technology, Agricolastraße 4, 38678, Clausthal-Zellerfeld, Germany.
Macromolecular rapid communications
|July 18, 2023
概括
聚乙烯化物 (PVDF) 的宏分子结构影响其结晶行为和在热诱导相分离过程中的多态相. 调整 PVDF 的情况
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
- 晶体学 晶体学是指结晶学.
背景情况:
- 聚乙烯化物 (PVDF) 是一种多用途的聚合物,可用于复合材料和膜.
- 控制PVDF的多态相对于优化材料性能至关重要.
- 热诱导相位分离 (TIPS) 是PVDF处理的一个关键过程.
研究的目的:
- 研究PVDF的宏分子架构如何影响其TIPS行为.
- 了解分支和区域缺陷对PVDF多态结晶的影响.
- 探索通过受控结晶来定制PVDF属性的潜力.
主要方法:
- 产生具有特定宏分子架构的PVDF分数.
- 使用TIPS的PVDF/γ-butyrolactone (PVDF/γ-BL) 系统的分析.
- PVDF分量的分子重量分布和分散的表征.
主要成果:
- 包括分支和区域缺陷在内的PVDF宏分子架构,显著影响温度依赖的结晶.
- 区域缺陷是30-25°C之间的结晶的主要驱动因素,而分支在25-20°C之间占主导地位.
- 从溶液中结晶的PVDF分量比初始聚合物具有更窄的分子量分布 (更低的分散性).
结论:
- 宏分子架构为通过温度控制的结晶来定制PVDF多态相提供了一条途径.
- 这些发现对于开发用于先进应用的定制PVDF矩阵材料至关重要.
- 需要进一步的研究,以充分阐明区域缺陷和分支在PVDF溶液结晶中的作用.
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