The application of modulated temperature power compensation DSC to the characterisation of polymer blends

被引：4

作者：

Bailey, NA ^{[1
]}

Hay, JN ^{[1
]}

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 1999年 / 56卷 / 03期

关键词：

crystallisation; glass transition; Lissajous diagrams; modulated temperature power compensation differential scanning calorimetry; polyethylene terephthalate/polycarbonate blends;

D O I：

10.1023/A:1010172021047

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

A modulated temperature power compensated differential scanning calorimeter, MTDSC, has been built from a standard Perkin-Elmer DSC model-2 such that a computer generated voltage has been applied to induce a sinusoidal change in sample temperature superimposed on a linear heating rate. The effect of amplitude of the temperature fluctuation, modulation period and block temperature on the reversibility has been assessed from the Lissajous diagram of heat flow vs, sample temperature. From their reproducibility and symmetry the most effective conditions for operating the MTDSC has been deduced. The specific heat of sapphire has been measured using these operational conditions for comparison with conventional DSC. Phase separated blends of polycarbonate (PC) and polyethylene terephthalate (PET) have been analysed.

引用

页码：1011 / 1016

页数：6

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