Thermal properties of MECDP copolyesters

MECDP copolyesters based on poly(ethylene terephthalate) were prepared with sodium-5-sulfo-bis-(hydroxyethyl)-isophthalate and poly(ethylene glycol) units as modifiers. Thermal properties of these copolyesters were characterized by differential scanning calorimetry and thermal gravity analyzer. Expe...

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Bibliographic Details
Published in:Thermal science 2012, Vol.16 (5), p.1456-1459
Main Authors: Zhao, Ming-Liang, Liu, Yuan, Li, Fa-Xue, Wang, Xue-Li, Gao, Yu, Yu, Jian-Yong
Format: Article
Language:English
Subjects:
Chemical bonds
Differential scanning calorimetry
Glass transition temperature
Melt temperature
Molecular chains
Polyethylene glycol
Polyethylene terephthalate
Thermal degradation
Thermodynamic properties
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Summary:MECDP copolyesters based on poly(ethylene terephthalate) were prepared with sodium-5-sulfo-bis-(hydroxyethyl)-isophthalate and poly(ethylene glycol) units as modifiers. Thermal properties of these copolyesters were characterized by differential scanning calorimetry and thermal gravity analyzer. Experimental results indicated that glass transition temperature, melting temperature and thermal degradation temperature reduced with increasing the poly(ethylene glycol) content. The incorporation of poly(ethylene glycol) increased the flexibility and irregularity of molecular chains which led to lower crystallinity, and bought more ether bonds into molecular chains. Besides, the thermal degradation under oxygen condition happened easily compared to that under nitrogen condition. nema
ISSN:0354-9836
2334-7163
DOI:10.2298/TSCI1205456Z