Coordination Bonds and Diels–Alder Bonds Dual Crosslinked Polymer Networks of Self‐healing Polyurethane,Journal of Polymer Science Part A: Polymer Chemistry

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Coordination Bonds and Diels–Alder Bonds Dual Crosslinked Polymer Networks of Self‐healing Polyurethane
Journal of Polymer Science Part A: Polymer Chemistry Pub Date : 2019-10-08 , DOI: 10.1002/pola.29508
Changhong Lin _{1,

2} , Dekun Sheng ₁ , Xiangdong Liu ₁ , Shaobin Xu _{1,

2} , Fance Ji _{1,

2} , Li Dong _{1,

2} , Yan Zhou _{1,

2} , Yuming Yang ₁

Affiliation

A dual crosslinked self‐healing polyurethane was prepared with robust mechanical properties through the dynamic reversible pyridine‐Fe³⁺ coordination bonds and Diels–Alder (DA) covalent bonds dual crosslinking strategy. Moreover, the mechanical properties and self‐healing ability of polyurethane can be tuned readily by different ratio of the coordination bonds and DA bonds. Under external load, the coordination bonds serve as sacrificial bonds are broken to dissipate energy, the DA bonds can keep the shape of sample. With the coordination bonds participation, the damaged samples can be healed under moderate heating treatment or with the aid of FeCl₃ solution. © 2019 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2019, 57, 2228–2234

中文翻译：

自修复聚氨酯的配位键和Diels-Alder键双交联聚合物网络

通过动态可逆的吡啶-Fe ³⁺配位键和Diels-Alder（DA）共价键双交联策略制备了具有强大机械性能的双交联自修复聚氨酯。而且，聚氨酯的机械性能和自愈能力可以通过配位键和DA键的不同比例容易地调节。在外力作用下，作为牺牲性键的配位键被破坏以耗散能量，DA键可以保持样品的形状。通过配位键的参与，受损的样品可以在适度的加热处理下或在FeCl ₃溶液的帮助下愈合。分级为4 +©2019 Wiley Periodicals，Inc.J.Polym。科学，A部分：Polym。化学 2019，57，2228年至2234年

更新日期：2019-10-08

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