Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5201277 | Polymer Degradation and Stability | 2016 | 10 Pages |
Abstract
A previous study carried out using dynamical thermogravimetry showed that radio-oxidation enhances the thermal degradation of poly(vinyl chloride) (PVC). In order to gain a better understanding of the mechanisms responsible for this thermal instability, a series of isothermal treatments were performed on radio-oxidized PVC. Two materials were studied: additive-free PVC and plasticized PVC. The samples were pre-degraded using γ-radiation under air at room temperature. The isothermal degradation at 120 and 150 °C of radio-oxidized PVC was then investigated using thermogravimetry followed by mass spectrometry, in-situ infrared spectroscopy and thermodesorption coupled with gas chromatography-mass spectrometry. For both pre-irradiated polymers the major weight loss appears after 30 min of heating at 120 °C or 150 °C. The gases responsible for this weight loss are mainly HCl, a small amount of benzene and CO2. Desorption of degradation molecules resulting from radio-oxidation also contributes to the weight loss.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Imène Boughattas, Eleonora Pellizzi, Muriel Ferry, Vincent Dauvois, Christine Lamouroux, Adeline Dannoux-Papin, Elisa Leoni, Emmanuel Balanzat, Stéphane Esnouf,