کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7825437 1502925 2018 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Identifying mechanically induced chemical changes to vintage grade high density polyethylene pipes during squeeze-off
ترجمه فارسی عنوان
شناسایی تغییرات شیمیایی ناشی از مکانیزم به لوله های پلی اتیلن با ضخامت بالا در طول فشار دادن
کلمات کلیدی
لوله های پلی اتیلن، فشردن شکست لوله شاخص کربنیل،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Squeeze-off is widely used within the gas industry for temporary interruptions to supply, both when extending and repairing the polyethylene (PE) pipe network. Over the years a number of pipe failures, have been attributed to damage caused at the squeeze-off location, often linked to non-standard squeeze-off practices. The purpose of this paper is to examine PE pipes that have been squeezed in the laboratory under ASTM and non-ASTM standard conditions to determine if any changes to the PE structure can be measured. Changes in the PE due to squeeze-off was measured by FTIR at the squeeze-off ear. The carbonyl index (CI), a measure of polymer degradation, was calculated for the various squeeze-off conditions and it was found that over-compression of the PE pipe caused the greatest amount of damage to the pipe and that is directly linked to the integrity of the pipe prior to being squeezed-off.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 65, February 2018, Pages 242-248
نویسندگان
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