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A Novel Reprocessable and Recyclable Acrylonitrile–Butadiene Rubber Based on Dynamic Oxime‐Carbamate Bond
Author(s) -
Wang Wenyan,
Song Qingfei,
Liu Qing,
Zheng Hua,
Li Chunmei,
Yan Yi,
Zhang Qiuyu
Publication year - 2019
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800733
Subject(s) - acrylonitrile , natural rubber , vulcanization , materials science , nitrile rubber , polymer chemistry , composite material , polymer , copolymer
The covalent cross‐linked rubber has outstanding mechanical properties and chemical resistance, making it possible for a wide range of applications. Towards efforts to resource waste and environmental pollution, rubber recycling is a concerning problem. However, it is a big challenge to endow the most widely used commercial rubber systems with recyclability. In this paper, a novel reprocessable and recyclable acrylonitrile–butadiene rubber (NBR) is developed by introducing oxime‐carbamate bonds into the raw NBR. Amidoxime NBR is prepared by a nucleophilic addition reaction of hydroxylamine hydrochloride and raw NBR, and then cross‐linked amidoxime NBR using different amounts of toluene diisocynate (TDI). Results show that the obtained material exhibits good reprocessable property; the repairing efficiency exceeds 90% after two remoldings. In addition, it also has better mechanical properties: A tensile strength reaching a maximum value of 4.85 MPa when TDI cross‐linker is 15.36 wt%, which is superior to vulcanized NBR (3.18 MPa).