Effects of Dynamic Covalent Bonds Multiplicity on the Performance of Vitrimeric Elastomers

Shuangjian Yu, Ganggang Zhang, Siwu Wu*, Zhenghai Tang, Baochun Guo* and Liqun Zhang

ABSTRACT: It is still a challenge to integrate multiple dynamic covalent bonds (DCBs) into one network, so the effects of DCBs multiplicity on the performance of covalent adaptive networks (CANs) is still unclear. In this contribution, based on the versatility of vanillin chemistry, we realized the construction of CANs containing different DCBs multiplicity, thus the influences of DCBs multiplicity on the vitrimeric performance of the networks are fairly investigated. It turns out that, with increasing DCBs multiplicity, the relaxation time of the networks can be reduced significantly because the dynamic performance of the CANs with double or triple DCBs are determined by not only the activation energy but the synergistic effect of different DCBs. A plausible method was first proposed to quantify the synergistic effect of DCBs multiplicity. We envisage that the disclosed findings will provide significant insight into the optimized design of CANs with tunable dynamic performance.

文章链接：https://pubs.rsc.org/en/content/articlepdf/2020/TA/D0TA06264B?page=search