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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.
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 Hsiao, K. J., et al., Physics and Kinetics of Alkaline Hydrolysis of Cationic Dyeable Poly(Ethylene Terephthalate) (CDPET) and Polyethylene Glycol (PEG)–Modified CDPET Polymers, Journal of Applied Polymer Science, 98 (2005), 2, pp. 550-556
 Varma, D. S., et al., Poly(Ester-Ether) Fibres. Die Angewandte Makromolekulare Chemie, 52 (1980), 1, pp. 23-36
 Kiyotsukuri, T., et al., Poly(Ethylene-Terephthalate) Copolymers with a Smaller Amount of Poly(Ethylene Glycol)s and Poly(Butylene Glycol)s. Polymer, 36 (1995), 13, pp. 2629-2635
 Wei, G. F., Hua, D. B., Gu, L. X., Thermal Stability of Poly(Ethylene-Co-Trimethylene Terephthalate)s, Journal of Applied Polymer Science, 101 (2006), 5, pp. 3334-3335
 Li, X. G., Huang, M. R., Bai, H., Kinetics of Thermal Degradation of Liquid-Crystalline Aromatic Polymers, Die Angewandte Makromolekulare Chemie, 256 (1998), 1, pp. 9-19
 Li, F. X., et al., Thermal Degradation and their Kinetics of Biodegradable Poly(Butylene Succinate-Co- Butylene Terephthate)s under Nitrogen and Air Atmospheres, Polymer Degradation and Stability, 91 (2006), 8, pp. 1688-1693