| Crystallization Behavior of Copolymer Poly(ethylene terephth-alate/isophthalate)(IPET) |
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| 作者姓名： | 顾书英 肖茹 顾利霞 |
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| 作者单位： | Gu ShuyingDepartment of Polymer Materials Science，Tongji University，Shanghai，200092Xiao Ru and Gu LixiaCollege of Materials Science & Engineering，Dong Hua University，Shanghai，200051 |
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| 摘 要： | The non-isothermal crystallization kinetics, isothermal crystallization and the morphology of crystals of the copolymer poly ( ethylene terephthalate/ isophthalate ) (IPET) were studied by DSC and polarized-light microscopy in this paper. DSC results indicate that the glass transition temperature Tg of IPET is slightly lower than that of poly (ethylene terephthalate) (PET), but the melting temperature Tm and the crystallization temperature Tc of PET and IPET have much difference. The difference of Tc between PET and IPET2 is about 7℃, and the difference of Tm between PET and IPET2 is about 16℃. From the kinetics analysis of the crystallization, the crystallization mechanism of all samples is of three-dimension spherulitic growth from instantaneous nuclei and the incorporation of isophthalate (IPA) decreases the crystallization rate of IPET greatly. The isothermal results indicate that the morphologies of PET and IPET crystals are all spherulite, which is in conformity to the results of non-isothermal d
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Crystallization Behavior of Copolymer Poly (ethylene terephthalate/isophthalate) (IPET) |
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| Gu Shuying.Crystallization Behavior of Copolymer Poly(ethylene terephth-alate/isophthalate)(IPET)[J].Journal of Donghua University,2001,18(1). |
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| Authors: | Gu Shuying |
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| Institution: | 1. Department of Polymer Materials Science, Tongji University, Shanghai, 200092
2. College of Materials Science & Engineering, Dong Hua University, Shanghai, 200051 |
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| Abstract: | The non-isothermal crystallization kinetics, isothermal crystallization and the morphology of crystals of the copolymer poly (ethylene terephthalate/ isophthalate )(IPET) were studied by DSC and polarized-light microscopy in this paper. DSC results indicate that the glass transition temperature Tg of IPET is slightly lower than that of poly(ethylene terephthalate) (PET), but the melting temperature Tm and the crystallization temperature Tc of PET and IPET have much difference.The difference of Tc between PET and IPET2 is about 7℃, and the difference of Tm between PET and IPET2 is about 16℃. From the kinetics analysis of the crystallization, the crystallization mechanism of all samples is of three-dimension spherulitic growth from instantaneous nuclei and the incorporation of isophthalate (IPA) decreases the crystallization rate of IPET greatly. The isothermal results indicate that the morphologies of PET and IPET crystals are all spherulite, which is in conformity to the results of nonisothermal dynamic crystallization. At the same time,the spherulite of IPET grows slower and has longer incubation time than the spherulite of PET under the same crystallization condition. |
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| Keywords: | non-isothermal crystallization kineties isothermal crystallization poly ( ethylene terephthalate/isophthalate) morphology |
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