High free volume glassy polymers are generally more selective to condensable vapors rather than to light gases. Such property makes these materials suitable for membrane-based separation processes, as for instance in the removal of VOCs. In this work, we focus our attention on Poly-(Trimethyl-Silyl)-Norbornene (Ad-Si-PNB). Using both a barometric and an optical apparatus, the sorption and dilation isotherms have been determined at 35°C for n-pentane and n-hexane: the solubility values are very high, like for PTMSP, because of the high free volume. Moreover, the Lattice Fluid parameters have been estimated, enabling us to compare the experimental data with the NELF model previsions. Permeability has been calculated as the product of diffusivity and solubility and it is higher for n-C6 than for n-C5.
M. Galizia, M. G. De Angelis, G. C. Sarti, Y. Yampolskii (2008). Addition-type polynorbornene with trimethylsilyl side groups: study of organic vapors sorption, transport and swelling. NEW YORK : AIChE.
Addition-type polynorbornene with trimethylsilyl side groups: study of organic vapors sorption, transport and swelling
GALIZIA, MICHELE;DE ANGELIS, MARIA GRAZIA;SARTI, GIULIO CESARE;
2008
Abstract
High free volume glassy polymers are generally more selective to condensable vapors rather than to light gases. Such property makes these materials suitable for membrane-based separation processes, as for instance in the removal of VOCs. In this work, we focus our attention on Poly-(Trimethyl-Silyl)-Norbornene (Ad-Si-PNB). Using both a barometric and an optical apparatus, the sorption and dilation isotherms have been determined at 35°C for n-pentane and n-hexane: the solubility values are very high, like for PTMSP, because of the high free volume. Moreover, the Lattice Fluid parameters have been estimated, enabling us to compare the experimental data with the NELF model previsions. Permeability has been calculated as the product of diffusivity and solubility and it is higher for n-C6 than for n-C5.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
