کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9694200 | 1459642 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
DSC monitoring of the cure kinetics of a castor oil-based polyurethane
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
جریان سیال و فرایندهای انتقال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Differential scanning calorimetry (DSC) has been used to monitor the reaction between castor oil and isophorone diisocyanate (IPDI), using a non-isothermal method, at different heating rates. The NCO/OH ratio in these systems was 1, so that the concentration of NCO and OH groups could be considered equivalent during all the experiments. Despite the complexity of the system, in which different order kinetics are possible, as well as physically controlled diffusion processes, data were fitted to a simple kinetic model, of apparent order n, apparent activation energy EA, and apparent frequency factor A0. The dependency of these parameters on heating rate was used to analyze kinetics of polymerization of these systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thermochimica Acta - Volume 427, Issues 1â2, March 2005, Pages 31-36
Journal: Thermochimica Acta - Volume 427, Issues 1â2, March 2005, Pages 31-36
نویسندگان
J.M.E. Rodrigues, M.R. Pereira, A.G. de Souza, M.L. Carvalho, A.A. Dantas Neto, T.N.C. Dantas, J.L.C. Fonseca,