US EPA

7445993 

Journal Article 

Thermally Reversible, Self-Healing Polyurethane Based on Propyl Gallate and Polyurethane Prepolymers with Varied Isocyanate Content 

Ding, H; Yang, X; Xu, L; Li, S; Xia, J; Li, Jae 

2020 

1 

Journal of renewable materials
ISSN: 2164-6325
EISSN: 2164-6341 

Tech Science Press 

8 

1 

1-11 

English 

10.32604/jrm.2020.08165 

WOS:000518408100001 

Thermosetting polyurethanes are widely used in various fields 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. © 2020, Tech Science Press. All rights reserved. 

Propyl gallate; thermosetting polyurethane; self-healing ability; mechanical property