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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29847

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Graded Orientation of the Linear Polymers
Some regularities of formation of a new structural state of the thermoplastic polymers - gradually oriented (stretched) state (GOS) are discussed. Transition into GOS is realized by the graded oriented stretching - by action of inhomogeneous mechanical field on the isotropic linear polymers or by zone stretching that is implemented on a standard tensile-testing machine with using a specially designed zone stretching device (ZSD). Both technical approaches (especially zone stretching method) allows to manage the such quantitative parameters of gradually oriented polymers as a range of change in relative elongation/orientation degree, length of this change and profile (linear, hyperbolic, parabolic, logarithmic, etc.). The possibility of obtaining functionally graded materials (FGMs) by graded orientation method is briefly discussed. Uniaxial graded stretching method should be considered as an effective technological solution to create polymer materials with a predetermined gradient of physical properties.
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[1] Structure and Properties of Oriented Polymers. I. M. Ward, Ed. Springer, 2012.
[2] Oriented Polymer Materials. S. Fakirov, Ed. John Wiley & Sons, 2008.
[3] “Oriented state,” in Encyclopedia of Polymers, vol. 2, V. Kabanov, Ed. Moscow, 1974, pp. 515–528.
[4] L. Nadareishvili, “Fabrication method and investigation of polymer films with a specified gradient of birefringence,” Georgian Engineering news, vol. 2, pp. 73-77, 2001, (in Georgian).
[5] N. Lekishvili, L. Nadareishvili, G. E. Zaikov, and L. Khananashvili, New Concepts in Polymer Science. Polymers and Polymeric Materials for Fiber and Gradient Optics. J. S. Vygodsky, Sh. A. Samsonia, Eds. VSP, Utrecht, Boston, Koln, Tokyo, 2002.
[6] L. Nadareishvili, Sh. Gvatua, Y. Blagidze, and G. E. Zaikov, “GB– optics – a new direction of gradient optics,” J. of Appl. Polym. Science, vol. 91, pp. 489–493, 2004.
[7] L. Nadareishvili, N. Lekishvili, and C. E. Zaikov, “Polymer media with gradient of the optical properties,” in Modern Advanced in Organic and Inorganic Chemistry, G.E. Zaikov, Ed. Nova Science Publ., New York, 2005, pp. 31–134.
[8] L. Nadareishvili, Sh. Gvatua, N. Topuridze, Y. Blagidze, L. Sharashidze, et al. “Polarization properties of polymer films with a gradient of birefringence,” Optical Society, St. Petersburg, vol. 10, pp. 12 – 18, 2005 (in Russian).
[9] L. Nadareishvili, R. Bakuradze, and N. Topuridze, “Some regularities of polymer gradient orientation in inhomogeneous mechanical field,” Proceedings of the Georgian National Academy of Science, Chemical Series, vol. 36, pp.197–200, 2010 (in Georgian).
[10] L. Nadareishvili, R. Bakuradze, N. Topuridze, T. Nakaidze, I. Pavlenishvili, et al, “Some regularities of gradient orientation of polymers in heterogeneous mechanical field,” Georgian Chemical Journal, vol. 11, pp. 281–283, 2011 (in Russian).
[11] L. Nadareishvili, Z. Wardosanide, N. Lekishvili, N. Topuridze, M. Kozlovski, and G. Zaikov, “Gradiently oriented state of linear polymers: formation and investigation,” Molecular Crystals and Liquid Crystals, No. 556, pp. 52–56, 2012.
[12] L. Nadareishvili, V. Akhobadze, Sh. Gvatua, N. Topuridze, L. Sharashidze, et al. “Device for stretching polymer films,” Georgian Patent, P 2992, 2003.
[13] L. Nadareishvili, Z. Wardosanidze, and G. Chelidze, “Polymeric films deformation method,” Georgian Patent, P 4182, 2007.
[14] L. Nadareishvili, Z. Wardosanidze, I. Skhirtladze, G. Chelidze, V. Akhobadze, et al, “Device for stretching polymer films,” Georgian Patent, P 4398, 2008.
[15] L. Nadareishvili. “Nadareishvili’s device for stretching the polymer samples,” Innovation application # AP 013456, Georgia.
[16] Y. Miyamoto, Functionally Graded Materials: Design, Processing and Applications. Springer, US, 1999.
[17] Functionally Graded Materials. N. J. Reinolds, Ed. Nova Science Publ, New-York, 2011.
[18] J. Sobczak and L. Drenchev, Functionally Graded Materials. Processing and Modeling. Warsaw, 2009.
[19] L. Nadareishvili, J. Aneli, A. Akhalkatsi, M. Bolotashvili, and G. Basilaia, “Composites with Gradient of electric and magnetic properties,” Problems of Mechanics, vol. 57, No. 4, pp. 78-84, 2014.
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