کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5200657 1502871 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Aging of poly(ether ether ketone) by heat and gamma rays - Its degradation mechanism and effects on mechanical, dielectric and thermal properties
ترجمه فارسی عنوان
پیری پلی کراتین (اتر اتر کتون) با اشعه های گرما و گاما - مکانیزم تخریب آن و اثرات آن بر خواص مکانیکی، دی الکتریک و حرارتی
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

In radiation research facility, where heat and radiation are two crucial factors inducing material degradation, highly stable materials are required. In the present work, various properties of poly(ether ether ketone) (PEEK) exposed to heat and gamma rays in air are instrumentally investigated. If PEEK is aged by heat and gamma irradiation in air, chemical bond scission, oxidation, crosslinking, and char formation occur as competing mechanisms. The temperature plays a decisive role in degradation, while the irradiation accelerates it. The mechanical properties deteriorate much earlier than the dielectric properties with the progress of aging. This means that the mechanical properties can be an important condition monitoring factor compared to the dielectric properties for PEEK-insulated apparatus or cables. If PEEK is aged severely, its electrical conductivity increases dramatically, whereas both real and imaginary parts of complex dielectric permittivity decrease, showing a marked contrast to many industrially important polymeric insulating materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 142, August 2017, Pages 117-128
نویسندگان
, , , ,