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Exploiting the reversible covalent bonding of boronic acids for self-healing/recycling of main-chain polybenzoxazines
Polymer Chemistry ( IF 4.1 ) Pub Date : 2022-05-20 , DOI: 10.1039/d2py00068g Sevinc Gulyuz 1 , Yusuf Yagci 1 , Baris Kiskan 1
Polymer Chemistry ( IF 4.1 ) Pub Date : 2022-05-20 , DOI: 10.1039/d2py00068g Sevinc Gulyuz 1 , Yusuf Yagci 1 , Baris Kiskan 1
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In this work, a new strategy for the synthesis of self-healable/recyclable polybenzoxazine networks under mild conditions by exploiting dynamic B–O bond exchanges is presented. The process is based on mixing main chain polybenzoxazine precursors with phenyl boronic acid and heating up to 180 °C. The obtained polybenzoxazine films displayed good self-healing properties at low temperatures and very mild pressures in the absence of additives to promote the healing process. The recovery extent of the films was quantified by tensile tests. The stress relaxation and sweep frequency behaviour of the films were analyzed by rheological measurements. The spectral and thermal behaviors of the films were also investigated. Moreover, the networks showed higher hydrolysis stability than those of conventional boronic esters because of the intramolecular coordination of B–N in the linkages.
中文翻译：
利用硼酸的可逆共价键进行主链聚苯并恶嗪的自修复/回收
在这项工作中，提出了一种利用动态 B-O 键交换在温和条件下合成自愈/可回收聚苯并恶嗪网络的新策略。该工艺基于将主链聚苯并恶嗪前体与苯基硼酸混合并加热至 180 °C。所获得的聚苯并恶嗪薄膜在低温和非常温和的压力下表现出良好的自愈性能，并且在没有促进愈合过程的添加剂的情况下。薄膜的恢复程度通过拉伸试验来量化。通过流变测量分析了薄膜的应力松弛和扫频行为。还研究了薄膜的光谱和热行为。而且，
更新日期：2022-05-20
中文翻译：
利用硼酸的可逆共价键进行主链聚苯并恶嗪的自修复/回收
在这项工作中，提出了一种利用动态 B-O 键交换在温和条件下合成自愈/可回收聚苯并恶嗪网络的新策略。该工艺基于将主链聚苯并恶嗪前体与苯基硼酸混合并加热至 180 °C。所获得的聚苯并恶嗪薄膜在低温和非常温和的压力下表现出良好的自愈性能，并且在没有促进愈合过程的添加剂的情况下。薄膜的恢复程度通过拉伸试验来量化。通过流变测量分析了薄膜的应力松弛和扫频行为。还研究了薄膜的光谱和热行为。而且，
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