کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5206077 | 1502947 | 2015 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Moisture sorption in polyamide 6.6: Experimental investigation and comparison to four physical-based models
ترجمه فارسی عنوان
جذب رطوبت در پلی آمید 6.6: بررسی تجربی و مقایسه آن با چهار مدل مبتنی بر فیزیکی
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کلمات کلیدی
پلی آمید 6.6، جذب آب، درجه حرارت، رطوبت نسبی، مدلهای مبتنی بر فیزیکی،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
چکیده انگلیسی
Water sorption in polyamide 6.6 has been characterized for a wide range of temperature (25°C to 80°C) and various water activities using a Dynamic Vapor Sorption testing machine. Complex sorption mechanisms govern the water uptake in the material. The competition between two main temperature dependant mechanisms has been observed: a Henry's sorption mechanism that mainly governs the sorption curve at low water activities, and a second mechanism at high water activities that could be related to the formation of water clusters. It is observed that the temperature dependency can mainly be attributed to the Henry's contribution. Four physically based models are then used and identified thanks to the extended experimental database. It is shown that a simple Flory-Huggins model is not able to capture the experimental observations at very high water activities for all the temperatures tested. The ENSIC model is a better choice, but good prediction for very high water activity cannot be obtained. Both modified Park and GAB models can accurately predict the volume fraction of water for the whole ranges of water activity and temperature, although the modified Park model should be preferred considering the number of parameters and the mathematical simplicity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 43, May 2015, Pages 10-20
Journal: Polymer Testing - Volume 43, May 2015, Pages 10-20
نویسندگان
M. Broudin, V. Le Saux, P.Y. Le Gac, C. Champy, G. Robert, P. Charrier, Y. Marco,