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Alexander L’vovich Kovarski - Russian physical chemist, Dr. Sci., professor, Honored Scientist of Russian Federation (2011), member of Russian Academy of Natural Sciences (2002), member of American Chemical Society (2010). Alexander L. Kovarski is acknowledged by the world scientific community researcher enriched the science of materials with new fundamental knowledge. Main research area is physical chemistry of polymers and composites, magnetic resonance of free radicals and nano-sized systems. == Principal scientific achievements == *A.L. Kovarski belonged to the group of researchers first used paramagnetic particles – stable nitroxide radicals as molecular sensors of structural and dynamic information of polymers (1966). This development formed the basis of a new effective method found wide application in material science and was named later “method of paramagnetic (or spin) probes and labels”.〔A.L.Buchachenko, A.L.Kovarskii, A.M.Wasserman. "Study of Polymers by Paramagnetic Probe Technique" in “Advances in Polymer Science” / Ed. Z.A. Rogovin, Halsted Press, Wiley, New York, 1974.〕〔A.L. Kovarskii, A.M. Wasserman and A.L. Buchachenko. “Spin Probe Studies in Polymer Solids” in “Molecular Motion in Polymers by ESR” / Eds. R.F. Boyer and S.E. Keinath. Harwood Academic Publishers, Chur, London, New York, 1978, V.1, P.177.〕〔A.L. Kovarski “Spin probes and Labels. A Quarter of a Century of Application to Polymer Studies”. Polymer Yearbook / Ed. R.A. Pethrick, Harwood Academic Publishers. Chur, London, New York, 1996. V.13, P.113.〕〔A.L. Kovarski. «Molecular Dynamics of Additives in Polymers». VSP, Utrecht, Netherlands, 1997.〕 *A.L. Kovarski conducted extensive research of the regularities of the dynamics of low-molecular weight additives in macromolecular substances that were presented in the fundamental monograph.〔Kovarskii,A.L., "Molecular-Dynamic Concept of the Reactivity of Polymers and Solids in the Light of PVT-Effects". Polymer Yearbook / Ed. R.A.Pethrick, Harwood Academic Publishers, Chur, London, New York, 1992, V.9, P.107.〕 *Using high pressure technique A.L. Kovarski ascertained the role of free volume and molecular mobility of solid media on the rate of chemical reactions, and justified molecular-dynamic concept of reactivity of polymer materials.〔〔"High Pressure Chemistry and Physics of Polymers"/ Ed. A.L.Kovarski, CRC-Press Inc., Boca Raton, USA, London, Tokyo, 1994.〕 *He established a mechanism of relaxation processes in vitrificated liquids and polymers (so called “α” and “β” processes) using electro physical techniques under high pressure.〔〔A.L. Kovarski. “Thermally Stimulated Depolarization Technique for Studying Polymer Relaxations” in “Encyclopedia of Engineering Materials”, Part A: “Polymer Science and Technology” / Ed. N.P.Cheremisinoff, Marcel Dekker, New York, 1988, V.1, P.643.〕 *Using the original method of localization of paramagnetic particles on the surface of inorganic fillers studied by electron paramagnetic resonance micro-rheological properties of interfacial layers in polymer composites.〔A.L. Kovarski, T.V. Yushkina. «Surfaces spin labeling: a new approach to studying macromolecules interaction with the solid surface and properties of boarder layers in polymer composites». Polymer News. 2002, V. 27, No.12, P.421.〕 *Under the leadership of A.L. Kovarski new methods for the research of magnetic nanoparticles aggregation in dispersions and macromolecular adsorption on nanoparticles surface have been developed using ferromagnetic resonance and electron paramagnetic resonance. These approaches are extremely informative when analyzing the coatings on magnetic particles used in medicine and in composites.〔A.L. Kovarski, O.N. Sorokina. «Update on Paramagnetic Sensors for Polymers and Composites Research». Smithers Rapra, Shawbury, UK, 2013.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Alexander Kovarski」の詳細全文を読む スポンサード リンク
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