Synthesis and characterization of amorphous poly(ethylene terephthalate)copolymers containing bis[4-(2-hydroxyethoxy)phenyl]sulfone

CMUR > College of Chinese Medicine > Graduate Institute of Chinese Medical Science > Journal articles > Item 310903500/1185

Please use this identifier to cite or link to this item: http://ir.cmu.edu.tw/ir/handle/310903500/1185

Title:	Synthesis and characterization of amorphous poly(ethylene terephthalate)copolymers containing bis[4-(2-hydroxyethoxy)phenyl]sulfone
Authors:	蔡育勳(Yuhsin Tsai);(Cheng-Hsing Fan);(Chi-Yuan Hung);蔡輔仁(Fuu-Jen Tsai)
Contributors:	中醫學院中國醫學研究所
Keywords:	Amorphous Copolymerization;Polyester;Microstructure;NMR
Date:	2009-01
Issue Date:	2009-08-19 16:36:02 (UTC+8)
Abstract:	Poly(ethylene terephthalate) copolymers (abbreviated as PETS) that contain bis[4-(2- hydroxyethoxy)phenyl]sulfone (BHEPS) were prepared from dimethyl terephthalate (DMT), ethylene glycol (EG) (5–95%) and BHEPS (5–95%). The compositions and microstructures of the copolyesters were determined by 1H and 13C nuclear magnetic resonance (NMR) spectroscopy, respectively. The thermal behaviors were studied over the entire range of copolymer compositions, using X-ray analysis, differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA). The molecular weights, optical characteristics and tensile properties of these polymers were also determined. Experimental results indicated that the copolymers had a random microstructure. The intrinsic viscosities of the copolymers ranged from 0.65 to 0.69 dL/g. The copolyesters with BHEPS of <10 mol% were crystallizable, whereas the copolyesters with BHEPS of P10 mol% were amorphous. Incorporating BHEPS affected the glass-transition temperature (Tg) values of those polymers, from about 81 C for PETS5 to 126 C for PETS95. The optical transmissions exceeded 86% for k = 400 nm for all of the amorphous polyesters. The tensile modulus and strength of the copolyesters increased with BHEPS. However, they also became brittle and their elongation at break decreased.
Relation:	EUROPEAN POLYMER JOURNAL45(1):115~122
Appears in Collections:	[Graduate Institute of Chinese Medical Science] Journal articles

Files in This Item:

File	Size	Format
	0Kb	Unknown	505	View/Open

Loading...