Conversion of the surface layers of poly(vinyl chloride) into aminoethyl podand nanofilms as a matrix at the surface of borane-selective sorbents

Nondetachable nanofilms of aminoethyl podands were obtained at the developed surface of PVC materials. Interactions of these films with gaseous boranes were studied for use as a hydrogen source. The steps of surface development were checked and the nature of diborane absorption was studied by FTIR spectroscopy. Original Russian Text ? A.Yu. Tsivadze, A.Ya. Fridman, N.P. Sokolova, E.M. Morozova, I.A. Gagina, A.M. Gorbunov, A.V. Dorokhov, A.Yu. Masanov, 2008, published in Fizikokhimiya Poverkhnosti i Zashchita Materialov, 2008, Vol. 44, No. 5, pp. 487–489.     

Bubble growth rate and phenomenon of degenerate boiling of a fluid in the form of film vaporization

An analysis of results of an investigation of vaporization of a thin fluid film under vacuum is presented. The vaporization process has basic features characteristic of bubble boiling of a fluid, except for formation of bubbles. This makes it possible to classify the phenomenon as degenerate boiling of a fluid in the form of film evaporation during which local thinning of the layer takes place and funnel- and crater-shaped structures are formed. Funnels and craters are vapor sources with different powers. Dependences of the bubble growth rate above vapor sources of both types that generalize available experimental data are obtained.     

Heat exchange in film condensation of stationary vapor on a vertical surface

New experimental data are presented on the condensation of chladone-21 on vertical tubes over a wide range of Reynolds numbers and are compared with theoretical results.Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 35, No. 6, pp. 1050–1058, December, 1978.