A study on the double melting behavior of poly(trimethylene terephthalate)
作者： Wei Zeng , Huihui Li , TianXi Liu , ShouKe Yan
DOI: 10.1007/S11434-008-0301-X
关键词: Poly(trimethylene terephthalate) 、 Differential scanning calorimetry 、 Analytical chemistry 、 Materials science 、 Crystallization 、 Polymer chemistry 、 Isothermal process 、 Optical microscope 、 Multidisciplinary
摘要: Double melting behavior of poly(trimethylene terephthalate) (PTT) was studied in detail by means differential scanning calorimetry (DSC) and optical microscopy. The results indicate that the low-temperature peak PTT at ca. 218°C for samples crystallized isothermally 203°C is associated with crystals produced secondary crystallization, while high-temperature it about 227°C related to primary crystallization. further demonstrate growing non-isothermally during cooling process are thermodynamically unstable can undergo structure reorganization DSC heating scan. reorganized melt temperature higher than crystallization 203°C. Consequently, non-fully samples, grown also exhibit contribution peak.
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