The effect of fluorine atoms on gas transport properties of new polynorbornene dicarboximides
摘要:
The new N-4-trifluoromethylphenyl-norbornene-5,6-dicarboximide (2a) and N-3,5-bis(trifluoromethyl)phenyl-norbornene-5,6-dicarboximide (2b) mixtures of exo and endo monomers were synthesized and polymerized via ring opening metathesis polymerization (ROMP) using bis(tricyclohexylphosphine) benzylidene ruthenium(IV) dichloride (I) and tricyclohexylphosphine 11,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene][benzylidene] ruthenium dichloride (II) to produce the corresponding polynorbornene dicarboximides Poly-2a and Poly-2b, respectively. The transport of five gases He. N-2, O-2, CO2 and CH4 across membranes prepared from Poly-2a was determined at 35 degrees C using a constant volume permeation cell. The gas transport properties of the fluorine containing polymer Poly2a were compared with those found for membranes from non-fluorinated poly(N-phenyl-exo-elidonorbornene-5,6-dicarboximide) (P-PhNDI). Gas permeability, diffusion and solubility coefficients of the fluorine containing polynorbornene Poly-2a were up to an order of magnitude larger than those of the non-fluorinated one. Poly-2a was found to have one of the largest gas transport coefficients reported to date in glassy polynorbornene dicarboximides. (C) 2008 Elsevier B.V. All rights reserved.
The effect of fluorine atoms on gas transport properties of new polynorbornene dicarboximides
摘要:
The new N-4-trifluoromethylphenyl-norbornene-5,6-dicarboximide (2a) and N-3,5-bis(trifluoromethyl)phenyl-norbornene-5,6-dicarboximide (2b) mixtures of exo and endo monomers were synthesized and polymerized via ring opening metathesis polymerization (ROMP) using bis(tricyclohexylphosphine) benzylidene ruthenium(IV) dichloride (I) and tricyclohexylphosphine 11,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene][benzylidene] ruthenium dichloride (II) to produce the corresponding polynorbornene dicarboximides Poly-2a and Poly-2b, respectively. The transport of five gases He. N-2, O-2, CO2 and CH4 across membranes prepared from Poly-2a was determined at 35 degrees C using a constant volume permeation cell. The gas transport properties of the fluorine containing polymer Poly2a were compared with those found for membranes from non-fluorinated poly(N-phenyl-exo-elidonorbornene-5,6-dicarboximide) (P-PhNDI). Gas permeability, diffusion and solubility coefficients of the fluorine containing polynorbornene Poly-2a were up to an order of magnitude larger than those of the non-fluorinated one. Poly-2a was found to have one of the largest gas transport coefficients reported to date in glassy polynorbornene dicarboximides. (C) 2008 Elsevier B.V. All rights reserved.
The effect of fluorine atoms on gas transport properties of new polynorbornene dicarboximides
作者:Joel Vargas、Araceli Martínez、Arlette A. Santiago、Mikhail A. Tlenkopatchev、Rubén Gaviño、Manuel Aguilar-Vega
DOI:10.1016/j.jfluchem.2008.09.011
日期:2009.2
The new N-4-trifluoromethylphenyl-norbornene-5,6-dicarboximide (2a) and N-3,5-bis(trifluoromethyl)phenyl-norbornene-5,6-dicarboximide (2b) mixtures of exo and endo monomers were synthesized and polymerized via ring opening metathesis polymerization (ROMP) using bis(tricyclohexylphosphine) benzylidene ruthenium(IV) dichloride (I) and tricyclohexylphosphine 11,3-bis(2,4,6-trimethylphenyl)-4,5-dihydroimidazol-2-ylidene][benzylidene] ruthenium dichloride (II) to produce the corresponding polynorbornene dicarboximides Poly-2a and Poly-2b, respectively. The transport of five gases He. N-2, O-2, CO2 and CH4 across membranes prepared from Poly-2a was determined at 35 degrees C using a constant volume permeation cell. The gas transport properties of the fluorine containing polymer Poly2a were compared with those found for membranes from non-fluorinated poly(N-phenyl-exo-elidonorbornene-5,6-dicarboximide) (P-PhNDI). Gas permeability, diffusion and solubility coefficients of the fluorine containing polynorbornene Poly-2a were up to an order of magnitude larger than those of the non-fluorinated one. Poly-2a was found to have one of the largest gas transport coefficients reported to date in glassy polynorbornene dicarboximides. (C) 2008 Elsevier B.V. All rights reserved.