延迟结晶反应启发的水性聚氨具有高性能
Chenxi Huyan1, Dong Liu2, Xiang Han1
1State Key Laboratory of Fluorine and Nitrogen Chemicals, School of Chemical Engineering and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, China.
Nature communications
|October 30, 2025
概括
本研究提出了一种具有增强机械强度和性的高性能水性聚氨弹性体 (WPUE). 它利用延迟结晶反应为传统热塑性聚氨弹性体 (TPUE) 的可持续替代品.
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
- 可持续化学 可持续化学
背景情况:
- 水性聚氨弹性体 (WPUE) 通过减少挥发性有机化合物 (VOC) 排放,为热塑性聚氨弹性体 (TPUE) 提供了一个可持续的替代品.
- 然而,与TPUE相比,WPUE通常具有较低的机械强度,这限制了其广泛采用.
- 开发高性能WPUE对于推进聚合物制造中的绿色化学原则至关重要.
研究的目的:
- 开发一种高性能水性聚氨弹性体 (WPUE),其机械性能与热塑性聚氨弹性体 (TPUE) 相似或超过.
- 调查负责WPUE中增强机械性能的自强化机制.
- 展示一种可持续和绿色的替代传统的基于溶剂的聚氨弹性体.
主要方法:
- 合成WPUE使用对称的单体和工程等级的键,以创建一个动态的双相结构.
- 描述WPUE的机械性能,包括性和强度,在拉力拉伸下.
- 对延迟结晶反应及其与变形过程中的双相结构相关性的分析.
主要成果:
- 在开发的WPUE中实现了0.959 GJ/m3的高性和81.8 MPa的强度.
- 鉴定了一种延迟结晶反应机制,由于硬质障碍,在~13的拉伸比率下触发.
- 在拉伸比>20时观察到硬和软部分的共同结晶,从而显著提高机械性能.
结论:
- 开发的WPUE通过一种新的自我增强机制表现出卓越的机械强度和性.
- 这一突破为传统TPUE提供了一个可行的,高性能和可持续的替代方案,与绿色化学目标保持一致.
- 设计的动态双相结构和延迟结晶反应是实现更广泛应用的强大的WPUE的关键.
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