Synthesis of self-healing supramolecular waterborne polyurethane with quadruple hydrogen bonds via ureidotriazine,Journal of Applied Polymer Science

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Synthesis of self-healing supramolecular waterborne polyurethane with quadruple hydrogen bonds via ureidotriazine
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-11-18 , DOI: 10.1002/app.51932
Hao Liu ₁ , Dongcheng Sun ₁

Affiliation

A supramolecular waterborne polyurethane (SWPU) with excellent mechanical and self-healing properties simultaneously is reported in this work. Herein, the SWPU were synthesized by using 2,4-diamino-6-undecyl-1,3,5-triazine react with isophorone diisocyanate to introduce ureidotriazine (UTr) structures into the main chain of polyurethane that can self-assemble to form quadruple hydrogen bonds systems. A higher dimerization constant obtained through introducing two intramolecular hexatomic ring hydrogen bonds into the UTr structure, and the hydrophobicity, plasticity brought by the undecyl group on the triazine ring are beneficial to make a great balance between the binding strength for mechanical performance and the chain reversibility, mobility for self-healing. Owing to the accuracy design, the SWPU exhibits high tensile stress (33.85 MPa) and excellent self-healing ability (90.52%), which shows an enormous application potential in the field of functional coatings and adhesives.

中文翻译：

脲基三嗪合成四氢键自修复超分子水性聚氨酯

本文报道了一种同时具有优异机械性能和自修复性能的超分子水性聚氨酯（SWPU）。在此，SWPU是通过使用2,4-二氨基-6-十一烷基-1,3,5-三嗪与异佛尔酮二异氰酸酯反应将脲基三嗪（UTr）结构引入聚氨酯主链中，从而自组装形成四联体。氢键系统。通过在UTr结构中引入两个分子内六原子环氢键获得更高的二聚常数，以及三嗪环上的十一烷基带来的疏水性、可塑性，有利于在机械性能的结合强度和链可逆性之间取得很好的平衡，自愈的机动性。由于精度设计，SWPU 表现出高拉伸应力 (33.

更新日期：2021-11-18

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