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Анотація
The article to determine peculiarities of macromolecule deformation behavior under conditions of a jet-shaping head that would allow to solve the issue related to the mechanism of increasing water-jet cutting power with polymer additions. In converging polyethyleneoxide solution flow macromolecules are forced by a hydrodynamic field to rather strong stretching that causes the dynamic structure formation in solutions. There have been studied experimentally velocity fields and their gradients as well as the degree of macromolecule unrolling under pattern conditions of a jet-shaping head in poluyethyleneoxide solutions flow. In converging polymer solution flow macromolecules are forced by a hydrodynamic field to rather strong (~ 60 % and more) stretching that causes the field restructuring. The determined regularities of macromolecules behavior in the flow under conditions of a jet-shaping head and manifested in this case effects of elastic deformations have paramount importance in understanding the mechanism of «anomalously» high cutting power of water-polymer jet. The work for the first time makes it possible to explain the nature of increased water-jet cutting power with polymer additions when cutting food products. Understanding the nature of increased cutting power of water-polymer jet will make it possible to develop recommendations on choosing regimes for water-polymer jet processing of food products by cutting.
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Посилання
2. Ponomarenko EV, Pogrebnyak AV, Naumchuk MV. The method of food produucts cutting by high-speed hydroabrasive-jet. Pat. 74608 Ukraine, MPK B 03 B 4/00, u201202141, Bul. 21; 2012.
3. Pogrebnyak A., Deynichenko GV. Research of the process of hydrocutting food products. Scientific journal NRU ITMO Series: Processes and equip-ment for food production. 2016; 3(29):, 48-62.
4. Ivanyuta YuF, Pogrebnyak VG, Naumchuk NV, Frenkel SYa. Flow structure of polyethylene oxide solutions in the input zone of a short capillary. Inzh.-Fiz. Zh. 1985; 49(4): 614-621.
5. Pogrebnyak VG, Voloshin VC. Ecological technology of creating waterproof screens. Donetsk:Knowledge;2010.
6. Brestkin YuV, Agranova SA, D'yakonova NE, Pogrebnyak VG. (Birefringence effects when there flow solutions of polymers in conditions of a stretching hydrodynamic field. Vysokomol. Soedin. 1989; 31(11): 844-846.
7. Brestkin YuV. Dynamic coil–extended chain phase transition in the longitudinal field. Acta Polymerica. 1987; 38(8): 470-477.
8. Peterlin A. Hydrodinamics of macromolecules in a velocity field with longitudinal gradient. J. Polym. Sci. Pt. Polym. Letters. 1966; 4(4): 287-291.
9. Nicolis G, Prigogine I. Self-ogganization in nonequilibrium systems. New York, London, Sydney, Toronto: A Wileuy-Intersclence Publication John Wiley&Sons; 1977.
10. De Gennes PG. Coil-stretch thransition of dilute flexible polymers under ultrahigh velocity gradients. J. Chem. Phys. 1974; 60(12): 5030-5042.