Dynamic Interfacial Cross-Linking Polymer Blends with Fiber-Like Phase Structure by Recycling
Dynamic Interfacial Cross-Linking Polymer Blends with Fiber-Like Phase Structure by Recycling
复制标题
通过回收实现具有纤维状相结构的动态界面交联聚合物共混物
DOI：
10.1002/mame.202100631
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发表时间：
2021
影响因子：
3.9
通讯作者：
Lin Tengfei
中科院分区：
文献类型：
--
作者：
Wang Jinyun;Su Tong;Zhuang Wei;Shi Cheng;Gao Min;Wu Xiao;Lin Cong;Lin Tengfei
聚合物共混物的性能很大程度上取决于其微观结构。因此，调整相结构和改善共混物的界面相互作用相对至关重要。受 vitrimer 中动态共价键的断裂和重组的启发，这些特殊的键被引入到聚合物共混物的相界面中。通过环氧化天然橡胶（ENR）、聚乳酸（PLA）和添加剂的反应共混，制备出具有动态界面交联的聚合物共混物。所制备的具有强烈界面相互作用的共混物显示出优异的回收能力。引人注目的是，用溶剂蚀刻可溶解物质后，原始聚合物共混物的多孔相结构变为第三次回收共混物的纤维状相结构，与大多数报道的聚合物共混物中的相结构完全不同。此外，复合材料在回收过程中机械性能显着增强。这项工作为调整聚合物共混物的相结构和改善界面相互作用提供了一种有效的方法。
The properties of polymer blends strongly depend on their microstructure. Thus, tuning the phase structure and improving the interfacial interaction of blends are relatively crucial. Inspired by the breaking and reformation of dynamic covalent bonds in vitrimers, these special bonds are introduced into the phase interface of polymer blends in this work. Through reactive blending of epoxidized natural rubber (ENR), polylactic acid (PLA) and additives, polymer blends with dynamic interfacial cross‐linking are fabricated. The prepared blends with intensive interfacial interactions display excellent recycling capacity. Strikingly, after etching the dissolvable substances with a solvent, the porous phase structure of original polymer blends changes to a fiber‐like phase structure of the third recycled blends, entirely distinct from most reported phase structures in polymer blends. In addition, the composites show great enhancements in mechanical properties during recycling. This work provides an effective method to tune the phase structure and improve the interfacial interaction of polymer blends.