کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7824597 | 1502921 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Regulation of pore morphologies of PU films and thereof water vapor permeability by varying tetrahydrofuran concentration in binary solvent
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
The concentration of tetrahydrofuran (THF) was used to regulate the pore morphologies of PU films using a THF/N,N-dimethylformamide (DMF) binary solvent. Macro-void, micro-pore, and potential inter-connected pores are classified according to the cross-sectional FESEM images. Corresponding pore forming mechanisms are proposed. The water vapor permeability (WVP) was linked with total pore areas of different kinds of pores. Mechanical properties as a function of THF concentration was also investigated. Optimized PU coating could be achieved at a 40â¯wt% THF bearing the tensile stress, strain, toughness, and WVP of 9.2â¯Â±â¯0.6â¯MPa, 1063.7â¯Â±â¯57.1%, 43.6â¯Â±â¯3.8â¯MJâ¯mâ3, and 1894.3â¯Â±â¯41.3â¯gâ¯mâ2·dayâ1, respectively. This provides an alternative avenue for the production of PU coating with balanced mechanical property and WVP.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer Testing - Volume 69, August 2018, Pages 32-38
Journal: Polymer Testing - Volume 69, August 2018, Pages 32-38
نویسندگان
Chunhua Zhang, Pei Lyu, Liangjun Xia, Yun Wang, Chen Li, Xin Xiang, Fangyin Dai, Weilin Xu, Xin Liu, Bo Deng,