کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
777548 1463541 2007 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Curing kinetics of polymeric diphenylmethane diisocyanate with different wood species
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Curing kinetics of polymeric diphenylmethane diisocyanate with different wood species
چکیده انگلیسی

The effect of wood species on the curing kinetics of diphenylmethane diioscyanate (pMDI)/wood systems under both oven-dry and moisture conditions was investigated. The results indicated that wood species did affect the curing kinetics of the pMDI/wood systems, such as activation energy, reaction rate and reaction enthalpy, under the oven-dry conditions due to the differences in structure and composition. However, the effect of wood species on the curing kinetics became insignificant when moisture was introduced into the pMDI/wood systems, suggesting that the reactions between isocyanate and water dominate the curing process. Wood species seemed not to affect the main reaction mechanism because a similar relationship between the activation energy and the degree of conversion was obtained for all species. The kinetics were also affected by different pMDI/wood ratios for the oven-dried wood system but not for the system with moisture, demonstrating that the hydroxyls in wood were restricted as reactant under the oven-dry conditions.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Adhesion and Adhesives - Volume 27, Issue 3, April 2007, Pages 244–249
نویسندگان
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