The Optimization of Diphenyl Methane Diisocynate Polymerization Process with the Used Frying Oil Polyalcohol to Foam Polyurethane Using RSM

Abstract

The used frying oil which was usually threw out and to be the waste had potency to be used as the material of polyurethane. Previously, it had to be converted into the polyol and then it was reacted with the Diphenyl Methane Diisocyanate (MDI). This research aimed to know the effect of MDI/polyol ratio and the quantity of the ethylene glycol on the compressive strength of polyurethane. The research was design by the Central Composite Design and the data was processed by the Response Surface Method. The calculation of data used the statistic 6. The choose variables as the independent variable were MDI/Polyol ratio (1, 2, and 3) and the quantity of ethylene glycol (10, 20, and 30 ml). The others were the fixed variable such as temperature (ambient), the quantity of catalyst (1 %) etc. The number of experiment which had to be done was 10 run. Based on the result of the data processing, the variable of MDI/Polyol ratio mostly affected the compressive strength of polyurethane. The optimal operation condition was achieved at MDI/Polyol ratio 1.82 and the quantity of ethylene glycol 25.177 ml. The produced polyurethane had the compressive strength 1,051.1 N/m2