Thermomechanical and Water-Responsive Shape Memory Properties of Carbon Nanotubes-Reinforced Hyperbranched Polyurethane Composites

被引：14
作者：
Rana, Sravendra [1 ]
Cho, Jae Whan [1 ]
Park, Jong-Shin [2 ]
机构：
[1] Konkuk Univ, Dept Text Engn, Seoul 143701, South Korea
[2] Seoul Natl Univ, Dept Biosyst & Biomat Sci & Engn, Seoul 151742, South Korea
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2013年 / 127卷 / 04期
基金：
新加坡国家研究基金会;
关键词：
hyperbranched; composites; polyurethanes; shape memory; carbon nanotubes; DYNAMIC-MECHANICAL BEHAVIOR; POLYMER NANOCOMPOSITES; BLOCK-COPOLYMERS; CASTOR-OIL;
D O I：
10.1002/app.37537
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Shape memory composites of hyperbranched polyurethane (HBPU) and acid-treated multi-walled carbon nanotubes (MWNTs) were prepared using an in situ polymerization method. HBPUs with different hard segments contents were synthesized via the A(2) + B-3 approach using poly(ethylene glycol) (PEG) as a soft segment, 4,4'-methylene bis(phenylisocynate), castor oil, and 1,4-butanediol as hard segment. Compared to HBPU, the HBPU/MWNT composites showed faster shape recovery and double the shape recovery stress in the thermomechanical shape memory test, which was dependent on the MWNTs content and HBPU hard segment content. The water-responsive shape memory effect of HBPU/MWNT composites was considered to result from the combined contribution of hydrophilic PEG and well dispersed MWNTs in highly branched HBPU molecules. (C) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 127: 2670-2677, 2013
引用
收藏
页码：2670 / 2677
页数：8
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