Department of Polymer Science and Engineering and the State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, China
szheng@sjtu.edu.cn
收稿:2020-03-22,
修回:2020-5-5,
录用:2020-5-15,
网络首发:2020-06-15,
纸质出版:2020-09
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Ding, H.; Zhao, B.; Mei, H.; Li, L.; Zheng, S. Transformation of commodity poly(hydroxyether of bisphenol A) into vitrimers , via, post crosslinking with hindered urea bonds. Chinese J. Polym. Sci. 2020, 38, 915–920
Hao Ding, Bingjie Zhao, Honggang Mei, et al. Transformation of Commodity Poly(hydroxyether of bisphenol A) into Vitrimers
Ding, H.; Zhao, B.; Mei, H.; Li, L.; Zheng, S. Transformation of commodity poly(hydroxyether of bisphenol A) into vitrimers , via, post crosslinking with hindered urea bonds. Chinese J. Polym. Sci. 2020, 38, 915–920 DOI: 10.1007/s10118-020-2457-z.
Hao Ding, Bingjie Zhao, Honggang Mei, et al. Transformation of Commodity Poly(hydroxyether of bisphenol A) into Vitrimers
In this contribution
we reported the preparation of vitrimers by using commodity thermoplastics
via
post crosslinking with hindered urea bonds (HUBs). First
three hindered urea diisocyanates (HUDIs) were synthesized
via
the reactions of
N
N
′-di-
tert
-butylethylenediamine
N
N
′-diethylethylenediamine
and piperazine with isophorone diisocyanate (IPDI). Thereafter
these HUDIs were used as the crosslinking agents to crosslink poly(hydroxyether of bisphenol A) (PH)
a commodity thermoplastics. Fourier transform infrared (FTIR) spectroscopy and dynamic mechanical thermal analyses (DMTA) indicated that the PH thermosets were successfully obtained. It was found that the thermosets displayed the behavior of vitrimers. The PH thermosets can be reprocessed at elevated temperature without using catalyst and the mechanical strengths of vitrimers were recovered as high as 95%. The reprocessing properties are attributable to dynamic exchange reaction of hindered urea bonds
contingent on types of hindered urea bonds.
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