کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4999081 | 1460490 | 2018 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of curing conditions on structural evolution and mechanical properties of UV-curable polyurethane acrylate coatings
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Tin whisker growth phenomenon, which can lead to short circuits in the electronic components and boards, becomes more critical in lead (Pb)-free electronics. One potential solution to this problem is to use a conformal coating to mitigate the tin whisker growth, for which its mechanical properties will play an important role. In this study, a polyurethane acrylate film under the dual curing system (UV and moisture) was investigated in terms of chemical structure evolution and mechanical properties with various curing conditions. To establish the relationship between curing conditions and mechanical behavior of the film, both the UV curing portion (10Â min, 20Â min, 30Â min and 40Â min) and moisture curing portion (2Â h, 3Â h, 4Â h and 5Â h) were evaluated. Infrared spectroscopy, Raman spectroscopy, differential scanning calorimetry and thermogravimetric analysis were used to examine the curing status and microphase separation of film under various curing conditions, which in turn influenced its mechanical behaviors. Mechanical properties of the film were not only evaluated by a uniaxial tensile stress-strain test but also by stress relaxation and creep tests to quantify the long-term, time-dependent behavior. In addition, the influence of strain rate in tensile test on the mechanical behavior of the film was studied. The tensile test results show that partial cured film (UV20Â min and moisture 4Â h) has optimum mechanical performance from the strength and ductility point of view. The fully cured film (UV40Â min and moisture 4Â h), however, possesses more strength to resist plastic deformation during a long-term loading.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 114, January 2018, Pages 58-67
Journal: Progress in Organic Coatings - Volume 114, January 2018, Pages 58-67
نویسندگان
Fei Dong, Suraj Maganty, Stephan J. Meschter, Junghyun Cho,