Effect of microphase-separation promoters on the shape-memory behavior of polyurethane

被引：0
|
作者：
Chen, Shaojun [1 ,2 ]
Cao, Qi [1 ]
Jing, Bo [1 ]
Cai, Yuanli [1 ]
Liu, Pengsheng [1 ]
Hu, Jinlian [2 ]
机构：
[1] Institute of Polymer Science and Engineering, College of Chemistry, Xiangtan University, Xiangtan, Hunan 411105, China
[2] Institute of Textiles and Clothing, Hong Kong Polytechnic University, Hung Hum, Kowloon, Hong Kong
来源：
Journal of Applied Polymer Science | 2006年 / 102卷 / 06期
关键词：
A series of segmented polyurethanes (PUs) with novel thermosensitive shape-memory behavior were synthesized via the in situ addition of a small amount of 1octadecanol (ODO) to a PU system. For comparison; liquid paraffin (LP) modified PUs were also synthesized. The effects of a small amount of ODO or LP on the PU supra-structure and the thermosensitive shape-memory properties were studied with X-ray diffraction; differential scanning calorimetry; dynamic mechanical analysis; and shape-memory studies. The results indicated that the in situ addition of a small amount of ODO (e.g; 0.3 wt %) remarkably promoted microphase separation; facilitating the ordered packing of soft segments and the formation of perfect hard-segment domains and thus significantly improving the shape-memory properties. In contrast; LP had less significant influence on the shape-memory behavior because of the macrophase separation of these nonpolar alkyl chains from the PU system. © 2006 Wiley Periodicals; Inc;
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页码：5224 / 5231
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