writer：Xiwei Xu, Songqi Ma*, Sheng Wang, Binbo Wang, Hongzhi Feng, Pengyun Li, Yanlin liu, Zhen Yu and Jin
keywords：动态共价交联高分子，席夫碱，D-A加成结构，性能可调网络，快速重塑
source：期刊
specific source：Macromolecular Rapid Communications
Issue time：2022年

Covalent adaptable networks (CANs) are a new type of polymers which possess excellent performance of thermosets and reprocessability of thermoplastics. Nevertheless, it is still a challenge to realize rapid reprocessing and post-adjusting (adjust properties after preparation). Herein, for the first time, a method of combining Schiff base and Diels-Alder adduct in one network was developed to achieve rapid reprocessing and post-adjusting. Through the dissociation of the Diels-Alder adduct at high temperatures, the cross-link densities of the networks were reduced, thereby accelerating the rearrangement of the networks and realizing the rapid reprocessing and self-healing. Moreover, the reconnecting degree of network after dissociation of Diels-Alder adduct could be easily controlled by annealing, as a result, the properties of the obtained CANs were post-adjustable. This work provides a simple and promising approach of achieving excellent reprocessing and post-adjusting for CANs via the synergism of an associative dynamic chemistry with a dissociative dynamic chemistry. This article is protected by copyright. All rights reserved

全文链接：https://onlinelibrary.wiley.com/doi/10.1002/marc.202100777