کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1315500 | 976036 | 2009 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The effect of fluorine atoms on gas transport properties of new polynorbornene dicarboximides The effect of fluorine atoms on gas transport properties of new polynorbornene dicarboximides](/preview/png/1315500.png)
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 [1,3-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, N2, O2, CO2 and CH4 across membranes prepared from Poly-2a was determined at 35 °C using a constant volume permeation cell. The gas transport properties of the fluorine containing polymer Poly-2a were compared with those found for membranes from non-fluorinated poly(N-phenyl-exo-endo-norbornene-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.
The synthesis and ring opening metathesis polymerization (ROMP) of 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 performed. The gas transport properties of the corresponding polymer (Poly-2a) were determined and found to be one of the largest reported to date in glassy polynorbornene dicarboximides.Figure optionsDownload as PowerPoint slide
Journal: Journal of Fluorine Chemistry - Volume 130, Issue 2, February 2009, Pages 162–168