Thermal studies on polycaprolactam

Autor: K. Gyurova, Bogdanov Bogdan G, V. Velev, A. Popov, I. Petrova, N. Nedelchev
Rok vydání: 2012
Předmět:
Zdroj: Journal of Thermal Analysis and Calorimetry. 111:1539-1544
ISSN: 1572-8943
1388-6150
DOI: 10.1007/s10973-012-2496-y
Popis: Initial granules and thin folia of polycaprolactam formed by pressing under various conditions were studied. Using an apparatus for simultaneous thermal analyses STA 449 F3 Jupiter (NETZSCH—Germany), the thermal behavior of the objects were studied in the temperature interval from 20 to 600 °C. From the DSC curves obtained, a number of thermal and thermo physical properties were determined, including the heats of melting and degrees of crystallinity of the crystalline phases formed. For comparison, the effective kinetic parameters and the most probable rate-determining mechanisms of thermal degradation of certain samples in air and inert media were determined from the TG data curves. The crystalline structure perfectness was proved to exert stabilizing effect while the moisture contained had negative effect on polymer thermal stability, especially in oxidative medium.
Databáze: OpenAIRE
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