Browsing by Author "Ogunleye, O. O."

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Effects of castor oil on the physical properties of polyether based flexible polyurethane foam
(American Eurasian Network for Scientific Information, 2008) Ogunleye, O. O.; Oyawale, F. A.; Suru, E.
A preliminary study was made on the effects of castor oil on the properties of polyether based polyurethane foam such as rising time ,density, hardness tensile strength, compression ,elongation and heat ageing. The castor oil was introduced into the polyurethane foam by partially substituting it for silicone oil through seven experimental set up based on the laboratory mix formulation on 500g polyether based polyol with 0%, 20%, 40%, 50%, 60%, 80% and 100% castor oil substitutions .Incorporating castor oil significantly increased density from 21kg/m3 for foam without castor oil up to 25.73kg/m3 for 80% castor substitution and hardness index from 119kN up to 125kN. Improved compression set from 7.14% to 3.45 % was also noticed why tensile strength and elongation decreased with increased castor oil. Also heat ageing did not significantly affect the properties of the foam samples. The rising time of foam also increased with the increased castor oil. Clear cut conclusions on 100% substitution of castor oil could not be made as the experimental sample collapsed totally.
Optimum allocation of silicone oil in flexible polyurethane foam production
(Southern Leyte State University (SLSU), Philippines, 2006-10) Ogunleye, O. O.; Oyawale, F. A.; Odewole, G. A.; Jaiyeola, H. O.
The high cost of purchasing good quality flexible polyurethane foam called for this project work which examines the possible reduction in the cost of production which will eventually lead to reduction in all overall market cost. Process optimization technique was adopted using gradual chemical variance method for the foam surfactant (silicone oil) to locate the optimum silicone oil quantity required as against the usual practice of 1part of silicone oil to 100 part of polyol for 20kg/m3 density foam. Seven different quantities (1.2g. 1.0g, 0.8g, 0.6g, 0.4, 0.2, 0g) of silicone oil were used to 100g of polyol in the experiments. It was discovered that the quality of the foam produced remained the same as the quantity of silicone oil used was gradually reduced from 1 part per 100parts of polyol to 0.76 parts per 100 parts ofpolyol. Thus the later ratio was obtained as the optimum quantity required for the foam production which was about 24% reduction but still maintaining same quality as that of 1part to 100 parts of polyol when subjected to all the required physical tests.