کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5200987 1502880 2016 29 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modelling the non Fickian water absorption in polyamide 6
ترجمه فارسی عنوان
مدل سازی جذب آب غیر فیاکی در پلی آمید 6
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
This paper investigates the water absorption of polyamide 6. The high amount of absorbed water in the polymer and the large resulting decrease in the glass transition temperature (Tg) leads to a non Fickian water diffusion when samples are immersed, which is a significant difficulty when trying to model the water profile in thick specimens. The aim of this study is to be able to model this particular behaviour based on physical considerations. First, it is shown that the non Fickian water diffusion is caused by an increase in the diffusivity during water absorption. Two cases are then identified; one below Tg where the diffusivity is described using an Arrhenius law and one above Tg based on the free volume theory. Then, these two laws are implemented in a specific model that is able to describe the non Fickian water diffusion over a wide range of temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Degradation and Stability - Volume 133, November 2016, Pages 404-412
نویسندگان
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