کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
776737 1463487 2014 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Investigating the extent of urea formaldehyde resin cure in medium density fibreboard: Characterisation of extractable resin components
ترجمه فارسی عنوان
بررسی میزان رزین اوره فرمالدئید در فیبرهای چگالی متوسط: مشخص کردن اجزای رزین قابل استخراج
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
چکیده انگلیسی

Panel mass and nitrogen losses indicate medium density fibreboard (MDF) panels bonded with differing urea formaldehyde (UF) resins readily lose some 40–70% of resin components on exposure to cold water soaking. Analysis reveals these labile extractable resin components to be low molecular weight UF oligomers which were not present in such amounts in the original UF resins. Panel emissions appear linked to the relative proportions of these extractable UF resin condensation products. Furthermore, results indicate that when applying resin to fibre, resin components may chromatographically separate and become unavailable to cross-link into a fully cured resin matrix. Differences in wood fibre extractives, resin chemistry or application methodology gave minor differences in extractable resin components, but a greater resin loading contributed to lower relative resin extractability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Adhesion and Adhesives - Volume 50, April 2014, Pages 50–56
نویسندگان
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