Lifetime simulation and thermal characterization of PVC cable insulation materials

• Published in: Journal of Thermal Analysis and Calorimetry 2005-11, Vol.82 (3), p.761-768
• Main Authors: BENES, M, PLACEK, V, MATUSCHEK, G, KETTRUP, A. A, GYÖRYOVA, K, EMMERICH, W. D, BALEK, V
• Format: Article
• Language: English
• Subjects: Applied sciences; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Properties and characterization; Thermal and thermodynamic properties
• ISSN: 1388-6150; 1588-2926; 1572-8943; 0368-4466
• DOI: 10.1007/s10973-005-0961-6

Thermal behavior of commercial PVC cable insulation both before and after extraction of plasticizers, fillers and other agents were tested by TG/DTG and DSC during heating in the range 20-800DGC in air. The ultrasound enhanced hexane extraction and dissolution in THF with subsequent precipitation of PVC were used to prepare `extracted' and `precipitated' samples. The total mass loss measured for the 'non-treated', `extracted' and `precipitated' PVC samples was 71.6, 66.6 and 97%, respectively. In the temperature range 200-340DGC the release of dioctylphthalate, HCl and CO2 was observed by simultaneous TG/FTIR. From TG results measured at different heating rates (1.5, 5, 10, 15 K min 1) in the range 200-340DGC the non-isothermal kinetics of the PVC samples degradation was determined. Activation energy values of the thermal degradation processes calculated by ASTM E 698 method, for ,non-treated', `extracted' and `precipitated' PVC samples were 174.6-17 kJ mint, 192.8-19 kJ min-1, 217.1-20 kJ min-1, respectively. These kinetic parameters were used for the lifetime simulation of the materials.