کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11027048 | 1666328 | 2018 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Accelerated aging of polyethylene pipe grades in aqueous chlorine dioxide at constant concentration
ترجمه فارسی عنوان
پیری سریع از نمرات لوله های پلی اتیلن در دی اکسید کلر آبی در غلظت ثابت
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کلمات کلیدی
لوله های پلی اتیلن، سالخورده، ضد عفونی، دی اکسید کلر،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
The impact of disinfected water on the degradation of polyethylene (PE) was investigated with immersion tests of two PE pipe materials in 10 and 5â¯ppm chlorine dioxide (ClO2) medium at 60â¯Â°C. Aging experiments in 1â¯ppm ClO2 at 60, 50 and 40â¯Â°C were also carried out to study the effect of different aging temperatures. During conditioning, the pH was kept at 6.8. A specific exposure device with continuous concentration control and adjustment has been applied in order to generate reliable and reproducible aging conditions. Sample characterization applying scanning electron microscopy (SEM), tensile test, dynamic oxidation tests as well as FTIR-spectroscopy indicated accelerated antioxidant consumption and polymer degradation. Material aging at 50â¯Â°C and above was found to be much faster than at 40â¯Â°C applying 1â¯ppm ClO2 concentration. An optimized testing condition for fast material characterization in case of 1â¯mm thick specimens was found to be a concentration of 1â¯ppm ClO2 at 50â¯Â°C. The simultaneously increasing material embrittlement and the consumption of active antioxidant molecules imply an apparent unselective reaction of ClO2 with the polymer and the stabilizers molecules. Moreover, the radical nature and the high reactivity of ClO2 led to the formation of carbon-chlorine species, which are assumed to originate from degraded antioxidant molecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 157, November 2018, Pages 80-89
Journal: Polymer Degradation and Stability - Volume 157, November 2018, Pages 80-89
نویسندگان
M. Bredács, A. Frank, A. Bastero, A. Stolarz, G. Pinter,