Crystallization and melting of polycarbonate studied by temperature-modulated DSC (TMDSC)

被引：18
|
作者：
Schick, C
Wurm, A
Merzlyakov, M
Minakov, A
Marand, H
机构：
[1] Univ Rostock, Dept Phys, D-18051 Rostock, Germany
[2] RAS, Inst Gen Phys, Moscow 117942, Russia
[3] Virginia Polytech Inst & State Univ, Dept Chem, Blacksburg, VA 24061 USA
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2001年 / 64卷 / 02期
关键词：
rigid amorphous fraction; semi-crystalline polymers; TMDSC; vitrification;
D O I：
10.1023/A:1011551102661
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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.
引用
收藏
页码：549 / 555
页数：7
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