Novel moisture-sensitive shape memory polyurethanes containing pyridine moieties

被引：143

作者：

Chen, Shaojun ^{[1
]}

Hu, Jinlian ^{[1
]}

Yuen, Chun-wah M. ^{[1
]}

Chan, Laikuen ^{[1
]}

机构：

[1] Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Hong Kong, Peoples R China

来源：

POLYMER | 2009年 / 50卷 / 19期

关键词：

Shape memory; Polymer; Supramolecular structure; ABSORPTION;

D O I：

10.1016/j.polymer.2009.07.031

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

In this communication, novel moisture-sensitive shape memory polyurethane (SMPU) was synthesized from 1,6-hexamethylene diisocyanate (HDI) and N,N-bis(2-hydroxylethyl) isonicotinamide (BINA) and 1,4-butanediol (BDO). Results show that the BINA based SMPUs have excellent moisture absorption properties which are not only influenced by the temperature, but also by the relative humidity (RH). As a result, high strain recovery with fast recovery speed is obtained after immersion in the moisture condition for a short time. FT-IR spectra provide a proof to the mechanism of moisture-sensitive SME which is based on the dissociation or disrupt of hydrogen bonding in the pyridine ring induced by moisture absorption. Thus, the strain recovery is achieved in the moisture-sensitive SMPUs by decreasing the glass transition temperature (T-g) below ambient temperature without external heating. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：4424 / 4428

页数：5

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