نتایج جستجو برای: surface active agent

تعداد نتایج: 1270598  

Journal: :Journal of the agricultural chemical society of Japan 1964

Journal: :Transactions of the Architectural Institute of Japan Summaries of Technical Papers 1966

Journal: :The Journal of the Society of Chemical Industry, Japan 1964

Journal: :Transactions of the Architectural Institute of Japan 1959

Journal: :iranian journal of chemical engineering 0
amir hosein navarchian department of chemical engineering, faculty of engineering, university of isfahan, p.o. box 81746-73441, i.r. iran zahra alihemati department of chemical engineering, faculty of engineering, university of isfahan, p.o. box 81746-73441, i.r. iran

this study presents the synthesis of polyvinyl acetate (pvac) by solution polymerization and its partial hydrolysis to polyvinyl alcohol (pva) using alkaline alcoholysis. the influence of the molar ratio of hydrolysis catalyst (naoh) to pvac and the time and temperature of the saponification reaction on the degree of hydrolysis and molecular weight of the pva were investigated using response su...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان - دانشکده مهندسی عمران 1392

abstract in aggregate, active forms of reactive silica with mineral names are sometimes associated with sand and gravel in concrete mixture. alkali hydroxides originated from alkalis in the cement or other resources form an alkaline silica gel with this reactive silica which becomes swallowed and expanded during time causing damage to concrete. there have been growing researches on alkaline r...

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