The thermomechanical method for evaluation of the crosslinking parameters in irradiated polyethylene |
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| Affiliation: | 1. Boris Kidrič Institute of Nuclear Sciences, Vinča, 11001 Belgrade, P.O. Box 522, Yugoslavia;2. North Carolina State University, Raleigh, NC 27607, U.S.A.;3. Silver Spring, Watchfield, Swindon SN6 8TF, U.K.;1. State Key Laboratory of Advanced Design and Manufacturing for Vehicle, Hunan University, Changsha, Hunan 410082, China;2. Department of Mechanics and Aerospace, College of Mechanical and Vehicle Engineering, Hunan University, Changsha, Hunan 410082, China;3. Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Institute of Advanced Structure Technology, Beijing Institute of Technology, Beijing 100081, China;1. Nanobiotechnology Department, New Technologies Research Group, Pasteur Institute of Iran, Tehran, Iran;2. Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran;3. Protein Chemistry Laboratory, Department of Medical Biotechnology, Biotechnology Research Center, Pasteur Institute of Iran, Tehran, Iran;4. Advanced Chemical Studies Lab, Department of Chemistry, K. N. Toosi University of Technology, Tehran, Iran;5. Department of Biomedical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran;6. Biotechnology Research Center, Pasteur Institute of Iran, No.358, 12 Farvardin St., 1316943551, Tehran, Iran;7. Department of Biotechnology School of Biology, Alzahra University, Tehran, Iran;8. Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran;9. Department of Medical Biotechnology, Pasteur Institute of Iran, Tehran, Iran;10. Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran;1. Centre for Composite Materials and Structures, Harbin Institute of Technology (HIT), No. 2 YiKuang Street, PO Box 3011, Harbin 150080, PR China;2. Department of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), Harbin 150001, PR China |
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| Abstract: | The measurement of penetration deformation above the melting point was used for determination of viscoelastic parameters, compliance and retardation time, in γ-irradiated polyethylene systems. The time-dependent penetration deformation was followed over two creep and recovery cycles. The five-element mechanical model equation was used for calculation of amplitudes, time factors and remained deformations. The modulus of elasticity, derived from the equilibrium compliance was used to obtain Mc, the value of the average molecular weight between crosslinks. |
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