Membrane permeability of some model compounds through macroporous membranes

Membranes consisting of various amounts of poly(2‐vinylpyridine) (PVN) and its oxide PVNO were prepared by casting from ethanol and pyridine solutions. Resultant membranes exhibited effective diffusion coefficients in the range of 10−9−10−11 cm2 s−1. Effective diffusion coefficients were affected by the casting solvent, and by the hydrophilic polymer (PVNO) content.
Journal of Applied Polymer Science


Reactive processing and properties of styrene-maleic anhydride and poly(tetramethylene ether glycol)
Bayram, G; Yılmazer, Ülkü (Wiley, 2002-03-07)
The anhydride/hydroxyl-functionalized blends of styrene-maleic anhydride (SMAH) with poly(tetramethylene ether glycol) (PTMEG) in the presence or absence of a hydrated zinc acetate catalyst were produced in a batch mixer and in a corotating twin-screw extruder. In batch mixing, torque values increased with time as a result of chain-extension/branching reactions. The reaction products were studied by thermal, mechanical, morphological, and spectroscopic characterization techniques. The glass transition tempe...
Synthesis of N-polyethereal polypyrroles and their application for the preconcentration of rare earth ions
Koksel, Bahar; CİHANER, ATİLLA; Kaya, Murat; Volkan, Mürvet; Önal, Ahmet Muhtar (Wiley, 2008-05-15)
Conducting polymers containing polyether pseudocages (PI, PII, PIII) have been synthesized via chemical oxidation of 1,5-bis(1,1-pyrrole)-3-oxabutane (MI), 1,8-bis(I,I-pyrrole)-3,6-dioxahexane (MII), and 1,11-bis(1,1-pyrrole)-3,6,9-trioxaundecane (MIII) using anhydrous FeCl3 in CHCl3. Because as obtained polymer resins did not give any response toward any cations, they were reduced (undoped) using chemical reducing agents. Tetrabutylammonium hydroxide was found to be more effective in undoping to obtain mor...
Side-chain functionalization of polystyrene with maleic anhydride in the presence of Lewis acids
Kurbanova, RA; Mirzaoglu, R; Akovali, G; Rzaev, ZMO; Karatas, I; Okudan, A (Wiley, 1996-01-10)
Polystyrenes with different molecular weights were chemically modified with maleic anhydride by use of certain cationic catalysts of Lewis acid type (BF3 . OEt(2), AlCl3, TiCl4, ZnCl2, FeCl3, and SnCl4) in chloroform. The effects of molecular weight of polystyrene, as well as type of Lewis acid used, on properties and structure of products were investigated. The interrelation between the molecular weight of polystyrene and content of carboxyl groups in the products was made. A direct relationship between th...
Thermal stability and decomposition mechanism of poly(p-acryloyloxybenzoic acid and poly(p-methacryloyloxybenzoic acid) and their graft copolymers with polypropylene, Part II
Cetin, S.; Tincer, T. (Wiley, 2008-04-05)
Thermal stability and decomposition mechanism of poly(p-acryloyloxybenzoic) acid (PABA), p-methacryloyloxybenzoic acid (PMBA), and their graft coproducts of PP were studied by differential scanning calorimetry, direct pyrolysis mass spectrometry, and TG/IR system, combined thermogravimetric analyzer, and FTIR spectrometer. The homopolymers and corresponding grafts were found to be stable in nitrogen atmosphere but started to decompose under atmospheric conditions when heated above 230 degrees C. PABA and PA...
Electrochemical polymerization of 9-fluorenecarboxylic acid and its electrochromic device application
Bezgin, Buket; CİHANER, ATİLLA; Önal, Ahmet Muhtar (Elsevier BV, 2008-09-01)
Poly(9-fluorenecarboxylic acid) (PFCA) was synthesized by electrochemical oxidation of 9-fluorenecarboxylic acid (FCA) using a mixture of nitromethane and boron trifluoride diethyl etherate as the solvent and tetrabutylammonium tetrafluoroborate as the supporting electrolyte. An insoluble and conducting brownish-orange film was deposited on the electrode surface, both during repetitive cycling and constant potential electrolysis at 1.15 V. Characterization of the polymer film has been carried out using Four...
Citation Formats
V. N. Hasırcı, “Membrane permeability of some model compounds through macroporous membranes,” Journal of Applied Polymer Science, pp. 925–932, 1987, Accessed: 00, 2020. [Online]. Available: