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

Journal of Thermal Analysis - Tập 64 Số 2 - Trang 549-555 - 2001
Schick, C.1, Wurm, A.1, Merzlyakov, M.1, Minakov, A.2, Marand, H.3
1Department of Physics, University of Rostock, Rostock, Germany
2General Physics Institute, RAS, Moscow, Russia
3Department of Chemistry, VPI and SU, Blacksburg, USA

Tóm tắt

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.

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Journal of Thermal Analysis

Tập 64 Số 2

549-555

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