| Autor: |
M. Füstöss-Wégner |
| Rok vydání: |
1978 |
| Předmět: |
|
| Zdroj: |
Thermochimica Acta. 23:93-102 |
| ISSN: |
0040-6031 |
| DOI: |
10.1016/0040-6031(78)85114-4 |
| Popis: |
The phase behaviour of metal-free phthalocyanine (H 2 Pc) has been studied in a differential scanning calorimeter. The effect of the thermal history of samples on the DSC curves was investigated to obtain data concerning the phase transition which appeared on α as well as β forms of H 2 Pc over the termperature range from 250 to 340 K. To characterize the α metal-free phthalocyanine at low temperatures, the capacitance of an Ag(H 2 Pc)Al sandwich was measured as a function of the temperature. The specific heats of the α and β forms of H 2 Pc and the heat of the α → β polymorphic transition were measured. Kinetic parameters of the α → β polymorphic transition have been derived from the calorimetric results. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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