长链生物基尼龙514盐:晶体结构,相变化和聚合
Zihan Li1, Lei Zhang2, Xiaohan Zhang1
1National Engineering Technique Research Center for Biotechnology, State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30, Puzhu South Road, Nanjing 211816, China.
Polymers
|February 24, 2024
概括
这项研究详细介绍了尼龙514单体的晶体结构和热稳定性,识别了无水和二水形式. 稳定二酸盐粉末被用于生产高性能尼龙514,具有改善的热性能和低吸收.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物化学 聚合物化学
- 晶体学 晶体学是指结晶学.
背景情况:
- 尼龙514是一种新型的长链生物基尼龙,由1,5-丁胺 (PDA) 衍生,通过生物技术途径从生物质生产.
- 单体盐,1,5-pentanediamine-tetradecanedioate (PDA-TDA),对于尼龙514的合成至关重要.
研究的目的:
- 为了识别和描述PDA-TDA单体的不同晶体形式.
- 调查晶体结构,热行为和PDA-TDA的稳定性之间的关系.
- 优化使用稳定的单体形式生产高性能尼龙514.
主要方法:
- 有效的结晶技术可以获得PDA-TDA盐.
- 用X射线衍射和热分析 (DSC/TGA) 来确定晶体结构和行为.
- 赫什菲尔德和IRI分析量化分子间相互作用和格子能量计算.
主要成果:
- 确定了PDA-TDA的两种晶体形式,无水和二水,并进行了结构性特征.
- 该研究确定了无水和二水形式之间的转化机制,强调了温度和水活动的作用.
- 使用稳定的二水合物单体合成的尼龙514表现出优异的热稳定性和低湿度吸收.
结论:
- PDA-TDA的二化形式是一种稳定的单体,适合生产高性能尼龙514.
- 了解晶体多态和稳定性是优化生物基尼龙生产的关键.
- 生物基尼龙514为先进材料应用提供了有前途的性能.
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