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Unformatted text preview: om Natural oil was employed as raw material in our study to synthesize epoxidize oil which has potential to replace conventional epoxy system. The natural oil has been synthesized using peroxoformic acid for the epoxidation process and copolymerized with active diluents to find the best for mulation. Samples were cured by exposing them to the ultraviolet (UV) radiation and characterization of resins was conducted by using Fourier Transform Infrared (FTIR), Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). All samples can be cured but different compositions shows different cure rate. Thermal degradation of the natural oil, epoxidizes oil and acrylated oil were found to begin degradation and has maximum decompositions at a range of temperature occur between 400 - 450 °C. Hardness, gel content, tensile strength and chemical resistances properties were strongly dependence to the amount of acrylate functionality in oligomer. POLY-O20 OPTIMIZING CELL STRUCTURE OF EPOXIDIZED RUBBER FOAMS BY VARYING BINARY ACCELERATOR SYSTEM
1 N. N. Najib , Z. M. Ariff, A. A. Bakar and C. S. Sipaut 1 1 2 1 School of Material and Mineral Resources Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia 2 School of Engineering and Information Technology, Universiti Malaysia Sabah, 88999 Sabah, Malaysia E-mail: firstname.lastname@example.org Foam final properties are largely affected by its cell characteristics such as size and structure, open or close nature and base materials. Variation in foam’s cell size can be obtained by altering the accelerator concentration in sulphur vulcanization system. In this study, amount of tetramethyl thiuram disulfide (TMTD) and benzothiazyl-2-cyclohexyl-sulphenamida (CBS) was varied to change the network crosslink density. The compounds were prepared using two-roll mill and then expanded via heat transfer foaming process using compression molding and air-circulating oven. The result showed that foam with high CBS concentration has largest average cell size and lower cross link density. CBS prolong scorch and curing time thus allows cell to grow further. Attempts were made to relate physical properties and cure characterist...
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- Spring '11