Shape memory polyurethanes cross-linked by surface modified silica particles

被引：62

作者：

Jang, Moon Kyoung ^{[1
]}

Hartwig, Andreas ^{[2
]}

Kim, Byung Kyu ^{[1
]}

机构：

[1] Pusan Natl Univ, Dept Polymer Sci & Engn, Pusan 609735, South Korea

[2] Fraunhofer Inst Appl Mat Res & Prod Technol Adhes, D-28359 Bremen, Germany

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2009年 / 19卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

POLYMER NANOCOMPOSITES; MECHANICAL-PROPERTIES; NANOPARTICLES; COMPOSITES; LINKING; GELS;

D O I：

10.1039/b816691a

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Thermoresponsive polyurethane (PU)-silica nanocomposites were synthesized by incorporating silica particles as multifunctional cross-linkers into the PU via sol-gel reactions. At 2 wt% silica, the composites showed over 99% shape fixity and shape recovery up to the 4th thermomechanical cycle along with outstanding mechanical properties in their rubbery as well as glass state. The incorporated nano-sized silica particles gave dual effects of multifunctional chemical cross-links and reinforcing fillers. The properties were favorably compared with those of uncross-linked PU and conventionally cross-linked PU.

引用

页码：1166 / 1172

页数：7

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