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
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Regulation of pore morphologies of PU films and thereof water vapor permeability by varying tetrahydrofuran concentration in binary solvent
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 40 wt% THF bearing the tensile stress, strain, toughness, and WVP of 9.2 ± 0.6 MPa, 1063.7 ± 57.1%, 43.6 ± 3.8 MJ m−3, and 1894.3 ± 41.3 g m−2·day−1, 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
نویسندگان
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