Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/13454
Title: Effect of microphase-separation promoters on the shape-memory behavior of polyurethane
Authors: Chen, S
Cao, Q
Jing, B
Cai, Y
Liu, P
Hu, J 
Keywords: Crystallization
Interfaces
Modification
Polyurethanes
Stimuli-sensitive polymers
Issue Date: 2006
Publisher: John Wiley & Sons
Source: Journal of applied polymer science, 2006, v. 102, no. 6, p. 5224-5231 How to cite?
Journal: Journal of applied polymer science 
Abstract: 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.
URI: http://hdl.handle.net/10397/13454
ISSN: 0021-8995
EISSN: 1097-4628
DOI: 10.1002/app.24754
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