Citation: JIA Lianda, F. R. SHEU, R.T.CHERN, H.B.HOPFENBERG. GAS SORPTION AND TRANSPORT IN POLY (PHENYLENE OXIDE)(PPO)AND ARYL-BROMINATED PPO MEMBRANES[J]. Chinese Journal of Polymer Science, ;1989, 7(4): 306-314. shu

GAS SORPTION AND TRANSPORT IN POLY (PHENYLENE OXIDE)(PPO)AND ARYL-BROMINATED PPO MEMBRANES

JIA Lianda ^{*，F.R.SHEU，R.T.CHERN，H.B.HOPFENBERG} ,
F. R. SHEU ,
R.T.CHERN ,
H.B.HOPFENBERG

Received Date: 18 April 1988

The apparent solubility (S), concentration-average diffusivity (D), and permeability (P), for C02, CH4 and N2 through PPO and aryl-brominated PPO at 35℃ for pressure ranging from 1 to 26 atm are reported. It is found that P, D, and S of the membranes to all the three gases vary with the extent of bromination. S increases with the increase of the percent of bromine in each case, but D to CO2 increases remarkably only at higher degree of brominafion, and therefore, P to CO2 is increased by more than 100% over a wide range of pressure in the case.The solubility data are well described by the dual mode sorption model.It is found that the gas molecules sorbed by the Langmuir mode are relatively more immobilized and the contribution of the nonequilibrium character of the polymer to gas permeation increases obviously for CO2and is hardly changed for CH4 with increasing bromine content.These observetions are interpreted in terms of changes in specific free volume(SFV) and the cohesive energy density (EMD) of the polymers.
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