材料科学
松香
聚合物
自愈
复合材料
自愈材料
扫描电子显微镜
差示扫描量热法
耐久性
高分子科学
化学工程
树脂酸
物理
工程类
病理
热力学
医学
替代医学
作者
Shalini Parihar,Bharti Gaur
标识
DOI:10.1016/j.porgcoat.2022.106889
摘要
The growing demand for the development of bio-based, greener and more sustainable polymeric systems was the inspiration to develop two bio-based thermo-reversible polymers derived from gum rosin, a product of pine trees, being reported in this article. The Diene moieties were inserted into the backbones of rosin-based polymers, and thermo-reversible Diels-Alder (DA) bonds were formed between the diene moieties of the polymers and the bismaleimide crosslinkers. The introduction of thermo-reversible linkages to the polymer improves the durability of the material by extending its life span and improving its mechanical properties as well. After damage, the material shows self-healing due to the thermo-reversibility, which causes the DA bonds to de-crosslink, allowing the material to reflow to the wounded site and seal the fracture. The DA and Retro-Diels-Alder (r-DA) reactions are analyzed by differential scanning calorimetry. The scanning electron microscope (SEM) was used to evaluate the self-healing capabilities of polymeric materials that were applied on glass surface, mild steel, and concrete specimens. Artificial scratches were created, and the repairing process was examined.
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