sorry, we can't preview this file

Table_1_A Degradable and Self-Healable Vitrimer Based on Non-isocyanate Polyurethane.DOCX (2.49 MB)

Table_1_A Degradable and Self-Healable Vitrimer Based on Non-isocyanate Polyurethane.DOCX

Download (2.49 MB)
dataset
posted on 19.10.2020, 10:04 by Haitao Wu, Biqiang Jin, Hao Wang, Wenqiang Wu, Zhenxing Cao, Jinrong Wu, Guangsu Huang

Developing degradable and self-healable elastomers composed of reusable resources is of great value but is rarely reported because of the undegradable molecular chains. Herein, we report a class of degradable and self-healable vitrimers based on non-isocyanate polyurethane elastomer. Such vitrimers are fabricated by copolymerizing bis(6-membered cyclic carbonate) and amino-terminated liquid nitrile rubber. The networks topologies can rearrange by transcarbonation exchange reactions between hydroxyl and carbonate groups at elevated temperatures; as such, vitrimers after reprocessing can recover 82.9–95.6% of initial tensile strength and 59–131% of initial storage modulus. Interestingly, the networks can be hydrolyzed and decarbonated in the strong acid solution to recover 75% of the pure di(trimethylolpropane) monomer. Additionally, the elastomer exhibits excellent self-healing efficiency (~88%) and fracture strain (~1,200%) by tuning the monomer feeding ratio. Therefore, this work provides a novel strategy to fabricate the sustainable elastomers with minimum environmental impact.

History

References