Thermally Reversible, Self-Healing Polyurethane Based on Propyl Gallate and Polyurethane Prepolymers with Varied Isocyanate Content
Thermally Reversible, Self-Healing Polyurethane Based on Propyl Gallate and Polyurethane Prepolymers with Varied Isocyanate Content
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DOI：
10.32604/jrm.2020.08165
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发表时间：
2020
影响因子：
--
通讯作者：
Hai-yang Ding;Xiaohua Yang;Xue Lina;Li Shouhai;Jianling Xia;Mei Li
中科院分区：
文献类型：
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作者：
Hai-yang Ding;Xiaohua Yang;Xue Lina;Li Shouhai;Jianling Xia;Mei Li
: Thermosetting polyurethanes are widely used in various fi elds owing to their excellent elasticity, strength and solvent resistance. Three environmental friendly propyl gallate-based self-healing polyurethanes were prepared from polyurethane prepolymers with varying isocyanate content. The thermal stabilities of the polyurethanes were tested using thermogravimetric analysis. Their self-healing and mechanical properties were analyzed using a universal testing machine and dynamic thermomechanical analysis. The polyurethanes were found with high self-healing ability and excellent mechanical properties due to the absence of phenolic carbamate. These qualities improved with increased isocyanate content and the prolonged self-healing time. We found, therefore, that the propyl gallate-based polyurethane has potential for use in industrial applications as self-healing materials.
