کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
692711 | 889850 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and performance of block copolymer modified epoxy coatings
ترجمه فارسی عنوان
ریز ساختار و عملکرد پوشش های اپوکسی اصلاح شده بلوک کوپلیمر
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کلمات کلیدی
بلوک کوپلیمر، پوشش اپوکسی، چقرمگی شکستگی، سایش سایش مقاومت،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تکنولوژی و شیمی فرآیندی
چکیده انگلیسی
The effects of two diblock copolymers, poly(ethylene-alt-propylene)-b-poly(ethylene oxide) (PEP-PEO) and poly(1,2-butadiene)-b-poly(2-vinyl pyridine) (PB-P2VP) on the mechanical properties of epoxy coatings were studied. Both modifiers self-assembled into spherical micelles of 10-20 nm diameter in cured bulk epoxy. This morphology was preserved in 15 μm thick coatings; however, micelle segregation to the coating/substrate interface was also observed. The critical strain energy release rate, G1c, of bulk thermosets was enhanced by up to fivefold with the addition of block copolymers. Likewise, the abrasive wear resistance of thin coatings increased with modifier inclusion. The results showed that at 5 wt.% of loading, block copolymers were able to impart a 40% increase in abrasive wear resistance to modified coatings over neat ones. Block copolymer modifiers did not sacrifice the modulus and glass transition temperature of bulk thermosets and coatings, or the hardness and transparency of coatings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Progress in Organic Coatings - Volume 77, Issue 7, July 2014, Pages 1145-1154
Journal: Progress in Organic Coatings - Volume 77, Issue 7, July 2014, Pages 1145-1154
نویسندگان
Tuoqi Li, Michael J. Heinzer, Erica M. Redline, Feng Zuo, Frank S. Bates, Lorraine F. Francis,