共聚物
差示扫描量热法
材料科学
丙烯酸酯
氢键
韧性
玻璃化转变
聚合物
动态力学分析
热重分析
单体
自愈
自愈材料
热稳定性
高分子化学
极限抗拉强度
延伸率
化学工程
复合材料
化学
分子
有机化学
热力学
病理
工程类
替代医学
物理
医学
作者
Lizhong Du,Yuting Zhong,Lijun Zhao,Chaosu Hu,Liang Shen,Yong Yang,Jiang Zhong
出处
期刊:Soft Matter
[The Royal Society of Chemistry]
日期:2024-01-01
摘要
Herein, a self-healing polyacrylate system was successfully prepared by introducing crosslinking agents containing disulfide bonds and monomers capable of forming quadruple hydrogen bonds through free radical copolymerization. This polymer material exhibited good toughness and self-healing properties through chemical and physical dual dynamic networks while maintaining excellent mechanical properties, which expanded the development path of self-healing acrylate materials. Compared to uncrosslinked and single dynamically crosslinked polymers, its elongation at break was as high as 437%, and its tensile strength was 5.48 MPa. Due to the presence of dual reversible dynamic bonds in the copolymer system, good self-healing was also achieved at 60 °C. In addition, differential scanning calorimetry and thermogravimetric analysis measurements confirmed that the thermal stability and glass transition temperature of the material were improved owing to the presence of physical and chemical cross-linking networks.
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