Adaptable Interlocking Macromolecular Networks with Homogeneous Architecture Made from Immiscible Single Networks,Macromolecules

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Adaptable Interlocking Macromolecular Networks with Homogeneous Architecture Made from Immiscible Single Networks
Macromolecules ( IF 5.1 ) Pub Date : 2020-01-07 , DOI: 10.1021/acs.macromol.9b02307
Wei Li Peng ₁ , Yang You ₁ , Pu Xie ₁ , Min Zhi Rong ₁ , Ming Qiu Zhang ₁

Affiliation

Traditional interpenetrating polymer networks (IPNs) are not adaptable materials because the topological structure of the macromolecules cannot be changed, which limits their structural rearrangement, reprocessing, and recycling. Here in this work we present a strategy for preparing reversibly interlocking networks (RILNs) from two preformed immiscible polymer networks based on dynamic covalent chemistry. The frequently opening and closing of the single networks enabled by the exchange reactions of the embedded orthogonal dynamic covalent bonds and stronger intercomponent interaction mainly account for the formation of the interlocking topology architecture of the RILNs. The resultant RILNs are rather homogeneous, which not only possess stimulus-responsive adaptive performance like self-healing but also exhibit nonlinear improvement in static and dynamic mechanical properties. By taking advantage of the reversible bonding, more importantly, the RILNs can be unlocked reproducing the pristine single networks, and the relocking/unlocking cycling is allowed to proceed for multiple times, which are not available for IPNs as defined by their chemical nature. It is anticipated that the proposed methodology provides a new idea for producing multifunctional cross-linked polymers capable of repeated controlled degradation and regeneration.

中文翻译：

具有互不相容的单一网络的均质架构的自适应互锁高分子网络

传统的互穿聚合物网络（IPN）不适合作为材料，因为大分子的拓扑结构无法更改，这限制了它们的结构重排，后处理和回收。在本文中，我们提出了一种基于动态共价化学从两个预先形成的不混溶聚合物网络中制备可逆互锁网络（RILN）的策略。嵌入的正交动态共价键的交换反应和更强的组分间相互作用使得单个网络的频繁打开和关闭，主要说明了RILN互锁拓扑结构的形成。产生的RILN非常均匀，它不仅具有自我修复等刺激响应自适应性能，而且在静态和动态力学性能方面均表现出非线性的改善。通过利用可逆键合，更重要的是，可以对RILN进行解锁，以复制原始的单个网络，并且可以对锁定/解锁循环进行多次，这对于IPN而言，化学性质无法定义。可以预期，所提出的方法为生产能够重复控制降解和再生的多功能交联聚合物提供了新的思路。并允许重新锁定/解锁循环进行多次，这对于IPN的化学性质而言是不可用的。可以预期，所提出的方法为生产能够重复控制降解和再生的多功能交联聚合物提供了新的思路。并允许重新锁定/解锁循环进行多次，这对于IPN的化学性质而言是不可用的。可以预期，所提出的方法为生产能够重复控制降解和再生的多功能交联聚合物提供了新思路。

更新日期：2020-01-07

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