Polymeric membranes terephthalate

It was proved that isotopes other than uranium, such as those of Ar, Ne, O, and H, could also be separated by gaseous diffusion (Fain and Brown 1974). The membranes developed for this purpose are made from alumina, gold, or glass (Konishi et al. 1983 Evans et al. 1983). Attanpts were made to use polymeric membranes for separating the isotopes. The manbranes from polyethylene terephthalate (PET),... 

FIGURE 43.7 Examples of porous structures produced in thin polymeric films using various methods of irradiation and chemical treatment. (Reprinted from Apel, P., Radial. Meas., 34, 559, 2001. With permission from Elsevier.) (A) Cross section of a polycarbonate membrane with cylindrical nonparallel pore channels (B) polypropylene membrane with slightly conical parallel pores (C) polyethylene terephthalate membrane with cigar-like pores and (D) polyethylene terephthalate membrane with bow-tie pores. 

Kravets, L., Dmitriev, S., Lizunov, N., Satulu, V, Mitu, B. and Dinescu, G. 2010. Properties of poly(ethylene terephthalate) track membranes with a polymer layer obtained by plasma polymerization of pyrrole vapors. Nucl. Instrum. Methods Phv.[Pg.208]

Trofimov, D.A., Shkinev. V.M., Spivakov, B.Ya. and Schue, F. 2009. Improvement of pore geometry and performances of poIy(ethylene terephthalate) track membranes by a protective layer method using plasma-induced graft polymerization of lH,lH,2H-perfluoro-1-octene monomer. 

Polymeric materials used for the production of track-etched membranes include poly(ethylene terephthalate) (PET), polycarbonate (PC), polyimide (Kapton), polypropylene, polyvinylidene fluoride, and CR-39 (allyl diglycol carbonate) (29). The most widely used are PET, PC, and Kapton. 

A. Friebe and M. Ulbricht. Controlled pore functionalization of poly(ethylene terephthalate) track-etched membranes via surface-initiated atom transfer radical polymerization. Langmuir. 23(20) 10316-10322, 2007. 

Friebe, A., Ulbricht, M. 2007. Controlled Pore Functionalization of PolyJEthylene Terephthalate) Track-Etched Membranes via Surface-Initiated Atom Transfer Radical Polymerization. Lan[Pg.225]

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