Synthesis and Characterization of Poly(carbonate urethane) Networks with Shape-Memory Properties

被引：35

作者：

Feng, Yakai ^{[1
]}

Xue, Yan ^{[1
]}

Guo, Jintang ^{[1
]}

Cheng, Lei ^{[1
]}

Jiao, Licai ^{[1
]}

Zhang, Yu ^{[1
]}

Yue, Jinlong ^{[1
]}

机构：

[1] Tianjin Univ, Sch Chem Eng & Technol, Tianjin 300072, Peoples R China

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 2009年 / 112卷 / 01期

关键词：

crosslinking; networks; polycarbonates; polyurethanes; thermal properties; POLYURETHANES;

D O I：

10.1002/app.29426

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this study, a series of shape-memory polyurethanes were prepared from polycarbonate diol (PCDL) with a molecular weight of 2000, trimethylol propane, and isophorone diisocyanate (IPDI). The properties of crosslinked poly(carbonate urethane) (PCU) networks with various compositions were investigated. The chemical Structures and thermal properties were determined with Fourier transform infrared (FTIR) spectroscopy, differential scanning calorimetry, and thermogravimetric analysis. FTIR analysis indicated that PCU had the structures of IPDI and PCDL and the amido formyl ester in polyurethane,. The gel content of PCU showed that PCU could be effectively formed as crosslinked polyurethane networks. The glass-transition temperatures of the PCU networks increased slightly with decreasing soft-segment content in the networks. The values Of Young's modulus in the networks at 25 degrees C increased with decreasing soft-segment content, whereas the tensile stress and breaking elongation decreased significantly. PCU showed shape-memory effects with a high strain fixity rate. (c) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 473-478, 2009

引用

页码：473 / 478

页数：6

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