The conformational changes, crystal structure and melting behavior of poly(ethylene/trimethylene terephthalate) copolyesters
作者： Tien-Wei Shyr , Chia-Hsing Tung , Wen-Sheng Cheng , Shi-Dong Jiang , Shou-Ke Yan
DOI: 10.1002/PI.4139
关键词:
摘要: The conformational changes, crystal structure and melting behavior of poly(ethylene/trimethylene terephthalate) (ET) copolyesters were investigated using in situ Fourier transform infrared (FTIR) spectroscopy, wide-angle X-ray diffraction (WAXD), transmission electron microscopy (TEM) differential scanning calorimetry (DSC) under isothermal crystallization conditions. results show that the minimum temperature was observed ET53, which relative amount ethylene glycol (EG) to 1,3-propanediol (PDO) 52.68/47.32 PDO-dimethyl terephthalate (DMT)-PDO segments molecular chain dominated formation. crystallinity ET found ET66, EG/PDO 65.91/34.09 EG-DMT-EG A rapid continuous transition FTIR first 10 min continuously adjusting conformation molecules reflects copolyesters. Based on DSC analyses copolyesters, crystalline transitions take place rapidly early. Copyright © 2012 Society Chemical Industry
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