Crystallization and Melting of Polycarbonate Studied by Temperature-Modulated DSC (TMDSC)

Temperature-modulated DSC (TMDSC) measurements at reasonably high frequencies allow for the determination of base-line heat capacity. In this particular case vitrification and devitrification of the rigid amorphous fraction (RAF) can be directly observed. 0.01 Hz seems to be a reasonably high freque...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2001-01, Vol.64 (2), p.549-555
Main Authors: Schick, C, Wurm, A, Merzlyakov, M, Minakov, A, Marand, H
Format: Article
Language:English
Subjects:
Bisphenol A polycarbonate
Crystallization
Devitrification
High frequencies
Vitrification
Online Access:Get full text
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Summary:Temperature-modulated DSC (TMDSC) measurements at reasonably high frequencies allow for the determination of base-line heat capacity. In this particular case vitrification and devitrification of the rigid amorphous fraction (RAF) can be directly observed. 0.01 Hz seems to be a reasonably high frequency for bisphenol-A polycarbonate (PC). The RAF of PC is established during isothermal crystallization. Devitrification of the RAF seems to be related to the lowest endotherm. For PC the melting of small crystals between the lamellae is expected to yield the lowest endotherm.
ISSN:1388-6150
1588-2926
DOI:10.1023/A:1011551102661