کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5201277 | 1502887 | 2016 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal degradation of γ-irradiated PVC: II-Isothermal experiments
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
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.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 126, April 2016, Pages 209-218
Journal: Polymer Degradation and Stability - Volume 126, April 2016, Pages 209-218
نویسندگان
Imène Boughattas, Eleonora Pellizzi, Muriel Ferry, Vincent Dauvois, Christine Lamouroux, Adeline Dannoux-Papin, Elisa Leoni, Emmanuel Balanzat, Stéphane Esnouf,