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Preparation and characterization of ultra violet (UV) radiation cured bio-degradable films of sago starch/PVA blend |
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| Authors: | Mubarak A Khan SK Bhattacharia MA Kader K Bahari |
| Institution: | aRadiation and Polymer Chemistry Laboratory, Institute of Nuclear Science and Technology, Bangladesh Atomic Energy Commission, P.O. Box 3787, Dhaka 1000, Bangladesh bDepartment of Applied Chemistry and Chemical Technology, University of Dhaka, Dhaka, Bangladesh cMalaysian Institute of Nuclear Technology Research, Bangi, 43000 Kajan, Malaysia |
| Abstract: | Polymer films of sago starch/polyvinyl alcohol (PVA) were prepared by casting and cured under ultra violet (UV) radiation. Different blends were made varying the concentration of sago starch and PVA. Tensile strength (TS) and elongation at break (Eb) of the prepared films were studied. Films made up of sago starch and PVA with a ratio of 1:2 showed the highest TS and Eb. The physico-mechanical properties of prepared films were improved by grafting with acrylic monomers with the aid of UV radiation. A series of formulations was prepared with two monomers 2-ethyl 2-hydroxymethyl 1,3 methacrylate (EHMPTMA) and 2-ethylhexylacrylate (EHA) and a photoinitiator. Monomer concentration, soaking time and radiation dose were optimized in terms of grafting and mechanical properties. The highest TS was at 50% EHMPTMA and 48% EHA and 2% photo initiator at 5 min soaking time and recorded value was 6.58 MPa. The prepared films were further characterized with NMR spectroscopy and scanning electron microscope (SEM). |
| Keywords: | Bioblend Sago starch PVA UV radiation Monomer treatment Photocuring |
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