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Title:	Synthesis and characterisation of polymeric materials from oleic acid and jatropha oil
Authors:	Min Min Aung (P37150)
Supervisor:	Zahira Yaacob, Assoc. Prof. Dr.
Keywords:	Polymers -- Synthesis Polymerization Universiti Kebangsaan Malaysia -- Dissertations Dissertations, Academic -- Malaysia
Issue Date:	11-Mar-2011
Description:	The preparation of polymers from renewable resources such as vegetable oil-based materials is currently receiving increasing attention because of the economic and environmental concerns. Polyurethane (PU) has been used for various applications due to their appreciable physical and mechanical properties. In order to use these compounds as starting materials for polyurethane synthesis, it is necessary to functionalised them to form polyols. In this study, a new kind of a high functional polyol, based on oleic acid for use in rigid polyurethane (PU) elastomer was synthesised and characterised. The first step was the esterification of the oleic acid with glycerol and the second step was the alcoholysis of hydroxylated oleic acid with triethanolamine to increase the diol to a high functional polyol. To achieve biodegradable materials with high performance, polyurethane (PU) from oleic acid - based polyol and 4,4- diphenylmethane diisocyanate (MDI) with different NCO/OH content was prepared. Characterisation of the elastomers was carried out by thermal and mechanical analyses. The analyses showed that the chain motion of polyurethane became more flexible with the high functional polyol. Oleic acid-based elastomer characterised before and after electron beam (EB) irradiation. The material was irradiated using a 2.0 MeV electron beam machine at doses between 50 kGy to 200 kGy in air at room temperature. Comparative studies were also made by additives and without additive for irradiated samples. The experiments have shown that EB irradiation increased tensile strength as well as modulus. The feasibility studies of an epoxidation and alcoholysis reactions for the production of polyols from unsaturated Jatropha oil (JO) has been conducted. The pure polyols were analysed and identified by means of Fourier transform-infrared (FT-IR), 1H-nuclear magnetic resonance (NMR), 13C-NMR as well as high-performance liquid chromatography (HPLC) analytical methods to determine the composition of the polyol components. It has been found that both polyols from these two comparative methods are suitable for use in the production of polyurethanes with desirable properties. Meanwhile studies on polyurethane adhesives of Jatropha oil-based shear strength tests of solid wood and plywood gave better results compared with palm oil based adhesives. The shear force of polyol based PUs was at the maximum of 3.87 kN with strength of 2.42 MPa compared with of Palm oil based adhesive. Comparative study of palm oil based and Jatropha oil based epoxidised polyurethane acrylate were synthesised and studied.Epoxidation of Jatropha oil and synthesis of epoxy JO acrylate reaction were take place. Palm oil based Polyurethane Acrylate (POBUA) and Jatropha oil based Polyurethane Acrylate (JOBUA) with OPF fibre composite for irradiation study by EB irradiation. Compare of these two results of mechanical testing, FTIR and follow by biodegradation study. The SEM micrographs have shown compactness in the irradiated samples. For biodegradability of biopolymer based polyurethane samples, study of soil burial follow by evaluation analysis of SEM and weight loss percentage was carried out. It is found that vegetable oil-based polymer with fiber and irradiated polymer gave shorter degradation time.,"Certification of Master's/Doctoral Thesis" is not available,Ph.D.
Pages:	146
Call Number:	TA455.P58M535 2011 3 tesis
Publisher:	UKM, Bangi
Appears in Collections:	Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina

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