基于2-乙烯基烯酸盐的随机共聚物表现出不同寻常的玻璃过渡宽度和易于自主自我修复的广泛组成范围
Tong Wang1, Wenshiue O Young2, Mathew J Suazo3
1Department of Chemical and Biological Engineering, Northwestern University, Evanston, IL, 60208, USA.
Macromolecular rapid communications
|August 16, 2024
概括
具有2-乙烯基烯酸盐 (EHA) 的统计共聚合物显示出广泛的组成自我愈合. 这一发现扩大了通过可调节性质的弹性和可持续聚合物材料的潜力.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 统计共聚合物通过共同分子选择提供可调节的特性.
- 以前的自我愈合的共聚合物由于交替序列,需要狭窄的组合带.
- 链间的二次结合对于聚合物的自主自我修复至关重要.
研究的目的:
- 为了研究共聚物是否可以在广泛的组成范围内实现连锁二次结合而没有交替序列的共聚物可以自我修复.
- 为了确定促进序列独立的二次结合的烯酸盐共体.
- 探索玻璃过渡宽度和广泛组成的自我愈合之间的关系.
主要方法:
- 合成和特征化烯 (S) /烯酸共聚合物,包括S/2-乙基烯酸 (EHA),S/n-烯酸 (nHA) 和S/n-丁烯酸 (nBA).
- 测量玻璃过渡宽度作为二次结合相互作用的指标.
- 评估了自主自我修复能力和损坏后的抗拉性物质恢复.
主要成果:
- 与S/nHA和S/nBA对照剂相比,S/EHA共聚物在所有组合中表现出明显更广泛的玻璃过渡范围.
- 在广泛的组合范围内,S/EHA共聚物表现出易于自主自我修复的损伤.
- 在S/EHA共聚合物中,在3-10小时内完全恢复了拉伸性能.
结论:
- 玻璃过渡宽度作为一种可靠的选工具,用于识别具有广泛成分自我愈合特性的共聚物.
- 使用EHA可实现序列独立的二次结合,在多种多聚合物组合中促进自我愈合.
- 这项研究促进了聚合物弹性和可持续性,通过在广泛的组成谱中实现可调节,自我修复的材料.
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