This content is not included in your SAE MOBILUS subscription, or you are not logged in.
Utilization of TGA Flynn-Wall and Arrhenius Analysis for Rapid Prediction of Automotive PVC Cable Performance
ISSN: 0148-7191, e-ISSN: 2688-3627
Published March 28, 2017 by SAE International in United States
This content contains downloadable datasetsAnnotation ability available
Both pellet raw material and resulting extruded insulation samples were obtained from three grades of PVC used to produce automotive insulation and were examined for thermal stability on a Thermogravimetric Analyzer (TGA). The Flynn Wall technique was used to obtain degradation activation energies by plotting ln(heating rate) vs 1/T and using a literature value of 7% weight loss as the point of performance failure. The Arrhenius relationship was used to predict multiple year lifetimes at 100°C from the multiple hour degradation times observed on the TGA at 200°C. The insulation specimens of two of the samples were found to be significantly less thermally stable than the pellets - indicating slight decomposition occurred during extrusion onto the cable core. All cable insulation samples predicted service lifetimes many times the expected auto life. A PVC insulation sample was examined for failure at various oven aging temperatures using ASTM D3032 mandrel wrap testing. The weight loss for failure was calculated by substituting the oven age time and temperature into the Arrhenius relationship and using an activation energy obtained from a plot of activation energy vs. weight loss which was found to be constant at weight losses greater than 1%.
CitationSmith, R., Ward, A., and Brintnall, D., "Utilization of TGA Flynn-Wall and Arrhenius Analysis for Rapid Prediction of Automotive PVC Cable Performance," SAE Technical Paper 2017-01-0398, 2017, https://doi.org/10.4271/2017-01-0398.
Data Sets - Support Documents
|[Unnamed Dataset 1]|
|[Unnamed Dataset 2]|
|[Unnamed Dataset 3]|
|[Unnamed Dataset 4]|
|[Unnamed Dataset 5]|
|[Unnamed Dataset 6]|
|[Unnamed Dataset 7]|
- Quinlan, D. T. “History of Automotive Cable” Delphi Packardpedia, (2015)
- Sevenster, A. “Electrical Insulating Characteristics” www.pvc.org/en/electrical-insulation-characteristics
- Benes, M., Milanov, N., Matuschek, G., Kettrup, A., Placek, V., and Balek, V., “Thermal Degradation of PVC Cable Insulation Studied by Simultaneous TG-FTIR and TG-EGA Methods”, J. Thermal Analysis and Calorimetry 78(2), 621 (2004)
- Flynn, J. H., and Wall, L. A., “General Treatment of the Thermogravimetry of Polymers” J. Res. Natl. Bureau of Standards A. Physics and Chemistry, 70A(6) (1966)
- Lopez-Manchado, M., Torre, L., and Kenny, J., “Kinetic Analysis of the Thermal Degradation of PP-EPDM Blends”, Rubber Chemistry and Technology, 73(4), 694 (2000)
- Risch, B. G., Fox, S., and van Delden, R. A., „Proceedings oft he 59th IWCS Conference“ (2010) p. 183
- Yang, H., Chen, P. L., and Ghandhi, P., “Proceedings of the 61st IWCS Conference” (2012) p. 791
- Scheirs, J., “Compositional and Failure Analysis of Polymers: A Practical Approach” J. Wiley and Sons, Chichester (2000) p. 332 ISBN: 0 471 625 72 8
- Arbitron, “In Car Trends” www.arbitron.com/downloads/incarstudy (2003)