Malleable and Self-Healing Covalent Polymer Networks through Tunable Dynamic Boronic Ester Bonds,Journal of the American Chemical Society

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Malleable and Self-Healing Covalent Polymer Networks through Tunable Dynamic Boronic Ester Bonds
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2015-05-15 , DOI: 10.1021/jacs.5b03551
Olivia R. Cromwell ₁ , Jaeyoon Chung ₁ , Zhibin Guan ₁

Affiliation

Despite numerous strategies involving dynamic covalent bond exchange for dynamic and self-healing materials, it remains a challenge to be able to tune the malleability and self-healing properties of bulk materials through simple small molecule perturbations. Here we describe the use of tunable rates of boronic ester transesterification to tune the malleability and self-healing efficiencies of bulk materials. Specifically, we used two telechelic diboronic ester small molecules with variable transesterification kinetics to dynamically cross-link 1,2-diol-containing polymer backbones. The sample cross-linked with fast-exchanging diboronic ester showed enhanced malleability and accelerated healing compared to the slow-exchanging variant under the same conditions. Our report demonstrates the possibility of transferring small molecule kinetics to dynamic properties of bulk solid material and may serve as a guide for the rational design of tunable dynamic materials.

中文翻译：

通过可调动态硼酸酯键的延展性和自愈性共价聚合物网络

尽管有许多涉及动态和自修复材料的动态共价键交换的策略，但能够通过简单的小分子扰动调整散装材料的延展性和自修复性能仍然是一个挑战。在这里，我们描述了使用可调节的硼酸酯酯交换速率来调节散装材料的延展性和自愈效率。具体来说，我们使用两个具有可变酯交换动力学的遥爪二硼酸酯小分子来动态交联含 1,2-二醇的聚合物主链。与相同条件下的慢交换变体相比，与快速交换二硼酸酯交联的样品显示出增强的延展性和加速愈合。

更新日期：2015-05-15

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