Crystallization behavior and crystal structure of poly(ethylene‐co‐trimethylene terephthalate)s |
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| Authors: | Xudong Chen Kun Yang Gong Hou Yujun Chen Yeping Dong Zhengfu Liao |
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| Affiliation: | 1. Institute of Polymer Science, School of Chemistry and Chemical Engineering, Sun Yat‐Sen (Zhongshan) University, Guangzhou 510275, China;2. Department of Chemistry, Guangxi Teachers Education University, Nanning 530001, China |
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| Abstract: | A series of random copolymers were synthesized by the bulk polycondensation of dimethyl terephthalate with ethylene glycol (EG) and propane‐1,3‐diol (PDO) in various compositions. Their composition and thermal properties were investigated. The copolymers with 57.7 mol % or more PDO or 14.4 mol % or less PDO were crystallizable, but those with 36–46.2 mol % PDO were amorphous. The nonisothermal crystallization behavior was investigated with varying cooling rates by DSC. Poly(ethylene terephthalate) (PET) and poly(trimethylene terephthalate) (PTT) homopolymers have relatively lower activation energy than their copolymers. PET‐rich copolymers (EG > 85.9%) exhibited PET crystal structure, and exhibited no PTT crystal structure; and PTT‐rich copolymers (PDO > 41.7%) exhibited PTT crystal structure, and exhibited no PET crystal structure. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007 |
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| Keywords: | isothermal crystallization poly(ethylene‐co‐trimethylene terephthalate) morphology subsequent melting behavior activation energy |
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