The effect of concentration of acrylic acid,dose rates and temperature on preirradiated graft of natural rubber-based thermoplastic elastomer |
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| Institution: | 1. Radiation Processing Department, Center for Nuclear Techniques, 217 Nguyen Trai, Dist. 1, Hochiminh City, Viet Nam;2. Department of Chemistry, College of Natural Science, University of Hochiminh City, 227 Nguyen Van Cu, Dist. 5, Hochiminh City, Viet Nam;1. OLEM, Institute of Mechanics, Bulgarian Academy of Sciences, Sofia, Bulgaria;2. Research Institute for Nuclear Problems, Belarusian State University, Minsk, Belarus;3. National Research Tomsk State University, Tomsk, Russia;4. Vilnius University, Vilnius, Lithuania;1. College of Physics and Information Technology, Shaanxi Normal University, Xian 710119, Shaanxi, PR China;2. Department of Physics, Xian University of Arts and Science, Xian 710065, Shaanxi, PR China;1. Department of Mechanical Engineering, National Institute of Technology Silchar, Assam 788010, India;2. Department of Mechanical Engineering, National Institute of Technology Raipur, Chhattisgarh 492010, India |
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| Abstract: | Grafting acrylic acid (AAc) onto thermoplastic elastomer (TE) films, a kind of product from natural rubber latex block-grafted by methyl methacrylate monomer was investigated. The preirradiated dose from a gamma Co-60 source for TE at 75 kGy was considered to be useful. Significant concentration of AAc aqueous solution for the grafting process is 20% (vol%). Dose rate of about 3.4 kGy/h is more effective for the graft. The temperature of around 90°C is suitable for obtaining a higher degree of graft. It is observed that the rate of grafting of AAc onto TE is proportional to 0.48 power of dose rate and 1.9 power of AAc concentration. The rate of grafting can be expressed as Rg=k·I0.48·M1.9. On the other hand, overall activation energy of the graft is estimated about 7.2 Kcal/mol. The FTIR spectrum analysis of TE and TE-g-AAc films was proceeded. |
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