Synthesis and characterization of polyols from refined cooking oil for polyurethane foam formation

Coswald Stephen Sipaut @ Mohd Nasri and Murni Sundang and Sariah Saalah and Hoon, T. C. and Mohamad Nasir Mohamad Ibrahim and Ismail Ab Rahman and Amirul Al-Ashraf Abdullah (2012) Synthesis and characterization of polyols from refined cooking oil for polyurethane foam formation. Cellular Polymers, 31 (1). pp. 19-38. ISSN 0262-4893


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In this study, synthesized polyols from refined cooking oil, one of the ingredients in producing polyurethane (PU) foam, were investigated. The effects of reaction time, pH and type of solvents used on the properties of the polyols were characterized by using gas chromatography mass spectrometry (GC-MS), Fourier transform infrared (FTIR) spectroscopy and gel permeation chromatography (GPC). Further studies were carried out by using the synthesized polyols in combination with other chemicals for PU foam formation. The characterizations of the PU foams were performed through chemical, morphological and thermal analyses. The results showed that the polyols were synthesized successfully from refined cooking oil by using epoxidation and the hydroxylation process. 50% of the unsaturated fatty acids in the refined cooking oil were converted to saturated fatty acids and hydroxyl compounds as the reaction time increased up to five hours. However, the chemical contents in the polyols did not show significant changes as the pH value increased from pH3 to pH7. Using different types of solvent in the process showed that the hydroxyl content of the polyols ranged between 57 to 69 mg KOH/ g, with M̄ w in the range of 15325 to 19320 g mol ¯¹.The results also revealed that not all the synthesized polyols were suitable for PU foam formation. It is recommended in this study that the minimum hydroxyl content and molecular weight of the synthesized polyol required for PU foam formation is 69 mg KOH/ g and 19320 g mol ¯¹ respectively. The properties of PU foam are highly dependent on the polyol and the water (blowing agent) content.

Item Type: Article
Uncontrolled Keywords: Epoxidation, Hydroxylation, Polyol, Polyurethane foam, Refined cooking oil, Chemical content, Cooking oil, Foam formation, Fourier transform infrared (FTIR) spectroscopies, Gas chromatography-mass spectrometry, Hydroxyl compounds, Hydroxyl content, pH value, Polyol, Polyurethane Foam, Polyurethane foam formation, Polyurethane foams, Blowing agents, Epoxidation, Fourier transform infrared spectroscopy, Gas chromatography, Gel permeation chromatography, Hydroxylation, Petroleum refining, pH effects, Refining, Rigid foamed plastics, Saturated fatty acids, Synthesis (chemical), Thermoanalysis, Unsaturated fatty acids, Alcohols
Subjects: T Technology > TP Chemical technology
Divisions: SCHOOL > School of Engineering and Information Technology
Depositing User: ADMIN ADMIN
Date Deposited: 07 Dec 2012 09:38
Last Modified: 11 Oct 2017 01:34

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