非异酸聚氨细分共聚物从双碳化物limidazolides
Jose I Sintas1, Ren H Bean1, Rui Zhang2
1School of Molecular Sciences & Biodesign Center for Sustainable Macromolecular Materials and Manufacturing (SM3), Arizona State University, Tempe, AZ, 85287, USA.
Macromolecular rapid communications
|March 12, 2024
概括
双碳化物化物 (BCI) 功能化为高分子量细分非异酸聚氨 (NIPU) 提供了一条有效的途径. 这项研究证明了BCI衍生的NIPU中的纳米相分离,与传统的聚氨相似.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
背景情况:
- 传统的聚氨 (PU) 合成依赖于危险的异酸盐.
- 非异酸聚氨 (NIPU) 提供了更安全的替代品,但需要有效的合成策略.
- 开发具有可控性质的高分子量细分NIPU对于先进的应用至关重要.
研究的目的:
- 为了证明使用Bis-carbonylimidazolide (BCI) 功能化合成高分子量细分NIPU的可行性.
- 研究硬片段度对BCI衍生NIPU的相位行为和形态的影响.
- 为了比较BCI衍生的NIPU中的纳米相分离与传统的基于异酸盐的PU.
主要方法:
- 化阶段聚合利用ED-2003杰法,4,4'-甲基二 ((环胺) 和BCI单体.
- 动态机械分析 (DMA) 和差分扫描热量计 (DSC) 用于热过渡分析.
- 原子力显微镜 (AFM) 和小角度X射线散射 (SAXS) 用于形态和纳米相分离的表征.
主要成果:
- 成功合成了40-80%重量硬段的细分聚乙烯NIPU.
- DMA和DSC显示出不同的热过渡 (Tg,Tm),对应于软,硬和混合相.
- AFM和SAXS证实了纳米相分离,并观察到纳米尺寸的棒状硬段组件.
- 发现BCI衍生的NIPU的相分离与异酸盐衍生的同类药物可比.
结论:
- BCI功能化是一种有效的非异酸盐途径,用于产生高分子量细分的NIPU.
- 合成的NIPU表现出受控的纳米相分离,这对于定制材料特性至关重要.
- 这种方法为开发更安全,高性能聚氨材料提供了一个有前途的途径.
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