Shape memory effects of poly(ethylene terephthalate-co-ethylene succinate) random copolymers

ASIA unversity > 醫學暨健康學院 > 生物科技學系 > 期刊論文 > Item 310904400/8638

Please use this identifier to cite or link to this item: http://asiair.asia.edu.tw/ir/handle/310904400/8638

Title:	Shape memory effects of poly(ethylene terephthalate-co-ethylene succinate) random copolymers
Authors:	Tsai, Yuhsin;Tai, Chia-hon;Tsai, Shih-Jung;Tsai, Fuu-Jen
Contributors:	Department of Biotechnology
Keywords:	Ethylene glycol;Organic acids;Polycondensation;Polyethylene terephthalates;Shape memory effect;Structure (composition);Synthesis (chemical) -Polyethylene succinates;Shape recovery rates
Date:	2008
Issue Date:	2010-04-07 13:18:01 (UTC+0)
Publisher:	Asia University
Abstract:	Random copolymers based on terephthalate acid, succinic acid and ethylene glycol, with thermally induced shape memory, were synthesized via melt polycondensation. The chemical structures of these poly(ethylene terephthalate-co-ethylene succinate) copolymers (PET-co-ES) were ascertained by <sup>1</sup>H NMR spectroscopy. The thermal and viscoelastic characteristics of these copolymers were studied in terms of the succinic acid content using differential scanning calorimetry and dynamic mechanical analysis. The shape memory effects of the copolymers were examined using the strain test. The experimental results suggested that all copolymers exhibited shape memory above the glass transition temperature and that the highest shape recovery rate was 90%. The shape recovery rates of all test samples declined with the number of cycles. This decrease in the shape recovery rate may result from the change in the degree of polymer orientation and/or crystallinity during repeated testing. © 2007 Elsevier Ltd. All rights reserved.
Relation:	European Polymer Journal 44:550-554
Appears in Collections:	[生物科技學系] 期刊論文

Files in This Item:

File	Description	Size	Format
		0Kb	Unknown	843	View/Open
310904400-8638.doc		33Kb	Microsoft Word	409	View/Open

Loading...