کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10147728 1646497 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigation of radio-oxidative ageing conditions on EVA/EPDM blends: Understanding the limitations posed as to representing long term in-use exposures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سطوح، پوشش‌ها و فیلم‌ها
پیش نمایش صفحه اول مقاله
Investigation of radio-oxidative ageing conditions on EVA/EPDM blends: Understanding the limitations posed as to representing long term in-use exposures
چکیده انگلیسی
The effect of gamma-irradiation and temperature to accelerate, in a representative way, the ageing of EVA (Ethylene Vinyl Acetate)/EPDM (Ethylene Propylene Diene Monomer) blends was investigated. These blends constitute model materials of cable insulation used in Nuclear Power Plants (NPPs). Physicochemical evolutions of the blends were monitored by InfraRed (IR) spectroscopy, gel fraction measurements and Differential Scanning Calorimetry (DSC). After having pointed out the main similarities between the thermooxidative degradation (100 °C) and the radiooxidative degradation at room temperature, both stresses were combined to accelerate the ageing. It is shown that combining gamma-irradiation and high temperature, or subsequent thermooxidation after radiooxidation, accelerates the ageing but may cause distortion within the degradation mechanisms. These limitations of representativeness encountered are particularly due to an increase in chain scission reactions and formation of new crystallites in the blend.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 436, 1 December 2018, Pages 130-140
نویسندگان
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