کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5202112 1502914 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Limits in the validity of Arrhenius predictions for field ageing of a silica filled polychloroprene in a marine environment
ترجمه فارسی عنوان
محدودیت در اعتبار پیش بینی های آرننیوس برای پیر شدن فیلسوف پلی کربولوپرول پر از سیلیکا در محیط دریایی
کلمات کلیدی
لاستیک پلی کلروپران، تست های سریع و طبیعی پیری، استخراج آرننیس، پیش بینی طول عمر، آب دریا،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

Accelerated ageing in natural sea water at different temperatures from 20 °C to 80 °C was performed on a silica filled polychloroprene rubber. Degradation when monitored with mechanical properties at both macroscopic and microscopic scale led to a large increase of the modulus coupled with a strong decrease of strain and stress at break. Data from tensile tests were used for lifetime prediction with an Arrhenius extrapolation for modulus, strain and stress at break. The validity of this lifetime prediction was evaluated using a 23 year-old sample aged in natural conditions. Strain at break could be predicted using an Arrhenius extrapolation with an activation energy of 50 kJ/mol. However, an extrapolation based on linear Arrhenius behaviour did not apply for modulus and stress at break due to the presence of a degradation profile across the sample. These observations confirmed that strain at break is not governed by bulk properties of samples but by the degradation rate at the external surface of the sample (i.e. in contact with water).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 99, January 2014, Pages 254-261
نویسندگان
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