کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7825295 | 1502924 | 2018 | 25 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The low temperature crystallization of hydrogenated nitrile butadiene rubber (HNBR)
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
HNBR was analyzed following low temperature storage (between 0â¯Â°C and â50â¯Â°C) in order to measure the effects of cold crystallization during exposure close to, and below, the glass transition temperature (Tg). Differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA) and hardness testing were performed to measure the changes in melting enthalpy, shear stiffness and hardness as a result of low temperature exposure. An increase in crystallinity was measured even when the HNBR was held well below the Tg of the HNBR. Although the degree of crystallinity due to low temperature exposure is estimated to be quite small, a significant increase in hardness was seen after 24â¯h exposure. The changes in properties due to the presence of “microcrystalline” regions are especially relevant for permanently low temperature applications, since the material properties over longer timescales at low temperatures may deviate significantly from the material properties measured immediately after cooling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 66, April 2018, Pages 228-234
Journal: Polymer Testing - Volume 66, April 2018, Pages 228-234
نویسندگان
Ben Alcock, Kjell Olafsen, Jon Huse, Frode Grytten,