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090			_aB-11085
245	1	0	_aEffect of Temperature and Membrane Preparation Parameters on Gas Permeation Properties of Polymethacrylates
490	0		_vJournal of Polymer Science: Part B: Polymer Physics, 45(22), p.3025-3033, 2007
520	3		_aPermeabilities of N2, Ar, O2, CO2, and H2 gases in PEMA (Polyethylmethacrylate)membranes have been measured above and below glass transition in the temperature range of 25-70 8C. The permeabilities of the gases were observed increasing with temperature. Arrhenius plot of permeability versus temperature data showed that there is a slope discontinuity at near to Tg of PEMA. In addition, the effects of membrane preparation parameters by solvent casting method (percentage of polymer in solvent, annealing temperature, annealing time, evaporation temperature, and evaporation time)have been investigated by using homogenous dense membranes of PEMA. It is observed that membrane preparation parameters strongly affect the membrane performance and the reproducibility of the permeability measurements. On the other hand, the effect of polymer structure on membrane performance has been investigated. Comparison of the permeabilities of N2, Ar, O2, CO2, and H2 gases in PEMA and PMMA membranes shows that PMMA membranes have smaller permeabilities and higher selectivities than PEMA membranes because of their higher glass transition temperature, Tg.
650	1	4	_aGAS PERMEATION
650	1	4	_aMEMBRANE PREPARATION
650	1	4	_aMEMBRANES
650	1	4	_aPOLYMETHACRYLATES
650	1	4	_aTHIN FILMS
700	1	2	_aGulmus, S.A.
700	1	2	_aYilmaz, L.
856	4	0	_uhttps://drive.google.com/file/d/1yGDkcGACDGko-3goVJg4If6BB0-QO1Jf/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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