Mechanochemistry has injected new vitality into the chemical synthesis process in the solid state as a new, cleaner synthetic technology. Here, to overcome a series of problems induced by common rubber functionalization techniques, a mechanochemistry method based on one-step construction of the functionalized cross-linking network in rubber processing is proposed. Two commercial epoxidized elastomers, epoxidized butadiene rubber and epoxidized natural rubber, were subjected to roll-shearing force in the presence of dopamine. The contrast swelling phenomenon and the pulsed sonication experiment results of model liquid epoxidized polybutadiene with phenol indicates the dialkyl epoxides in epoxidized polybutadiene have intrinsic mechanical activity in the bulk state, and a cross-linking network containing amine and hydroxyl groups is therefore simultaneously constructed via rubber processing. A combination of mechanochemistry with conventional vulcanization technology enables the joint construction of multiple cross-linking networks containing both covalent cross-linking networks and reversible networks, resulting in epoxidized polybutadiene compounds with improved damping performance and malleability and self-healing properties.

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将机械化学引入橡胶加工：丁二烯弹性体的绿色功能化交联网络

机械化学作为一种新的、更清洁的合成技术，为固态化学合成过程注入了新的活力。在这里，为了克服常见橡胶功能化技术带来的一系列问题，提出了一种基于橡胶加工中功能化交联网络一步构建的机械化学方法。两种商业环氧化弹性体，环氧化丁二烯橡胶和环氧化天然橡胶，在多巴胺的存在下经受滚动剪切力。模型液体环氧化聚丁二烯与苯酚的对比溶胀现象和脉冲超声实验结果表明环氧化聚丁二烯中的二烷基环氧化物在本体状态下具有固有的机械活性，并因此通过橡胶加工同时构建含有胺和羟基的交联网络。机械化学与传统硫化技术的结合能够共同构建包含共价交联网络和可逆网络的多个交联网络，从而产生具有改进阻尼性能、延展性和自修复性能的环氧化聚丁二烯化合物。