Simulation of isothermal cure of a powder coating - Non-isothermal DSC experiments

被引：77

作者：

Ramis, X ^{[1
]}

Salla, JM ^{[1
]}

Cadenato, A ^{[1
]}

Morancho, JM ^{[1
]}

机构：

[1] Univ Politecn Cataluna, ETSEIB, Lab Termodinam, E-08028 Barcelona, Spain

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2003年 / 72卷 / 02期

关键词：

activation energy; compensation effect; isothermal kinetics; non-isothermal kinetics; thermosetting powder coating;

D O I：

10.1023/A:1024562607857

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The curing of a thermosetting powder coating was studied by means of differential scanning calorimetry ( DSC). The isothermal cure was simulated by non-isothermal experiments. The results of the simulation were compared with experimental isothermal data. From non-isothermal isoconversional procedures ( free model), it was concluded that these permit simulation of the isothermal cure but do not enable us to determine the complete kinetic triplet ( A preexponential factor, E activation energy, f(alpha) and/ or g(alpha) function of conversion). Non-isothermal procedures based on a single heating rate or on master curves present difficulties for determination of all the kinetic parameters, due to the compensation effect between preexponential factor and activation energy. The kinetic triplet can be determined by a combination of various non-isothermal methods or by using experimental isothermal data in addition to non-isothermal data.

引用

页码：707 / 718

页数：12

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