Solution behavior of Na sulfonated polystyrene: Dipole moment determinations

Date

1990

Author

Güler, Hatice
Aras, Leyla
Vanderschueren, J.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

155
views

0
downloads

Solution behavior of Na sulfonated polystyrene (NaSPS) ionomers with different percentages of sulfonate was studied by viscosity and dipole moment measurements. Two solvents of different character were chosen, i.e. dioxane (ϵ = 2.22) and dimethyl formamide (DMF, ϵ = 36) and their mixtures. The reduced viscosity as a function of concentration in polar solvents reflects the ‘polyelectrolyte’ behaviour of the ionomers. Mean‐squared dipole moment (<μ2>/x) values were calculated over a temperature range of 20–100°C, in dioxane and in a mixture of 4% DMF in dioxane. The results confirm the ‘polyelectrolyte’ behavior of ionomers by the addition of a small amount of polar cosolvent. The effect of increasing temperature on <μ2>/x in the DMF‐dioxane mixture is attributed to the formation of a coordination complex.

Subject Keywords

General Engineering, General Materials Science, Polymer Science

URI

https://hdl.handle.net/11511/51395

Journal

British Polymer Journal

DOI

https://doi.org/10.1002/pi.4980220310

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Electrical properties and photoconductivity of polyaniline/sulfonated poly(arylene ether sulfone) composite films Sankir, Nurdan D.; Sankir, Mehmet; Parlak, Mehmet (Springer Science and Business Media LLC, 2009-05-01) Temperature dependent electrical conductivity of the polyaniline-sulfonated poly(arylene ether sulfone) with 35 mol percent sulfonation (PANI-BPS35) composite films were investigated in the temperature range of 80-380 K. These composite films showed semiconductor behavior with the exponential variation of inverse temperature dependence of electrical conductivity. Calculated Mott's parameters showed that variable range hopping mechanism is the dominant transport mechanism for the carriers in low temperature ...
Synthesis and structure elucidation of bromination products from dibromohomobenzonorbornadienes: high temperature bromination - Part 17 Kazaz, C; Dastan, A; Balcı, Metin (Wiley, 2005-01-01) The electrophilic addition of bromine to dibromohomobenzonorbornadiene derivatives at -45 +/- 5degreesC led to the formation of the rearranged and non-rearranged tetrabromides in a ratio of 6:4. However, high-temperature bromination of the same system in CCl4 at 77degreesC produced only non-rearranged products. The formation mechanism of the isomers and the role of the substituent on the rearrangement is discussed. The structure elucidation of the isomeric tetrabromides was achieved from NMR spectral data. ...
DSC STUDIES ON MELT CRYSTALLIZED, DRAWN AND FUMING NITRIC-ACID OXIDIZED POLYETHYLENE Akar, Ahmet; Zaim, Ömer; Tinçer, Teoman; Aydoğan, A. Cevdet (Wiley, 1989-4) Melting, recrystallisation and remelting of undrawn and drawn linear polyethylene with different molecular weight were studied by differential scanning calorimetry before and after oxidation with nitric acid.
Measurement of transport properties of poly(methylmethacrylate-co-methacrylic acid) ion-containing membranes Şanli, Oya; Aras, Leyla (Wiley, 1990) Several membranes prepared from poly(methylmethacrylate‐co‐methacrylic acid) and its Li+ and Zn2+ ionomers were tested for NaCl, creatinine and urea permeability. The permeabilities of the membranes were explained on the basis of pore contents determined from their scanning electron microscope micrographs. All the membranes showed higher permeabilities during the first 2 hours of experimentation. Introduction of Zn2+ ions into the copolymer as crosslinking agent did not have much effect on the membrane prop...
Crystallization kinetics of fluorophosphate glasses .1. Effect of composition and hearing rate Ozturk, A (Springer Science and Business Media LLC, 1997-05-15) Crystallization behaviour of glasses from the system AlF3-MF2-Ba(PO3)(2) (M = Ca, Mg, Sr, Ba) have been studied using differential thermal analysis as a function of Ba(PO3)(3). The kinetic parameters for crystallization, namely, the activation energy, E frequency factor, v, and Avrami exponent, n, were determined. E,v and n decreased with increasing Ba(PO3)(2). Crystallization commenced at higher temperatures and the crystal growth mechanism changed from bulk to surface with increasing Ba(PO3)(2). X-ray dif...

Citation Formats

H. Güler, L. Aras, and J. Vanderschueren, “Solution behavior of Na sulfonated polystyrene: Dipole moment determinations,” British Polymer Journal, pp. 245–248, 1990, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/51395.