Solution properties of ionomers. 2. Simple salt effect

Hara, M.; Jian, Wu; Lee, A. H.

doi:10.1021/ma00192a040

Cited by 41 publications

(44 citation statements)

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“…Figure 2 is the plot of the reduced viscosity versus concentration for parent SEBS, free acid, magnesium, and sodium salt of sulfonated SEBS. This is similar to the result reported in research literature for randomly sulfonated polystyrene 3,8 at first look. The reduced viscosity of the ionomer solution is lower than that of unmodified polymer in dilute concentration, and is higher over a certain concentration cЈ (although the experimental concentration is not high enough to reach cЈ for H ϩ and Mg ϩϩ samples).…”

Section: Resultssupporting

confidence: 92%

Studies of the solution properties of sulfonated-(styrene-(ethyrene-CO-butylene)-styrene) block copolymer

Yan

Cheng

1998

J. Polym. Sci. B Polym. Phys.

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Section: Resultssupporting

confidence: 92%

Studies of the solution properties of sulfonated-(styrene-(ethyrene-CO-butylene)-styrene) block copolymer

Yan

Cheng

1998

J. Polym. Sci. B Polym. Phys.

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“…The attraction between the electronic dipoles and the repulsion between the dipoles and the hydroThe association/dissociation of ionomers in noncarbon backbone chain lead to the aggregation of polar and polar solvents have been a focused issue the dipoles and the consequent association of the for more than 10 years, and the lightly sulfonated ionomers, which has been experimentally conpolystyrene (SPS) ionomer was usually chosen as firmed by rheology, light scattering, small-angle a model compound. [1][2][3][4][5][6][7][8] In nonpolar solvents, such neutron scattering, and fluorescence. [9][10][11][12][13][14][15][16] When as tetrahydrofuran (THF) and xylene, the ionic dissolving in a polar solvent, such as dimethylgroups are not completely dissociated, but exist formamide (DMF), the ionomer chains in solution behave like polyelectrolytes.…”

Section: Introductionmentioning

confidence: 99%

Fluorescence and light-scattering studies on the formation of stable colloidal nanoparticles made of sodium sulfonated polystyrene ionomers

Jiang

1997

J. Polym. Sci. B Polym. Phys.

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“…In general, r g decreases with the concentration of salt in polyelectrolyte solution due to the screening of charges by the excess counterions added, [34,35] and the presence of salt may also suppress the aggregation of polymer molecules. [36] The r g values of polymer 1 in the presence of different electrolytes were measured and the results are shown in Figure 1. In all cases, the r g of the polymer decreases with increasing salt concentration.…”

Section: Resultsmentioning

confidence: 99%

Layer‐by‐Layer Deposition of Rhenium‐Containing Hyperbranched Polymers and Fabrication of Photovoltaic Cells

Tse

Man

Cheng

et al. 2006

Chemistry A European J

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Multilayer thin films were prepared by the layer‐by‐layer (LBL) deposition method using a rhenium‐containing hyperbranched polymer and poly[2‐(3‐thienyl)ethoxy‐4‐butylsulfonate] (PTEBS). The radii of gyration of the hyperbranched polymer in solutions with different salt concentrations were measured by laser light scattering. A significant decrease in molecular size was observed when sodium trifluoromethanesulfonate was used as the electrolyte. The conditions of preparing the multilayer thin films by LBL deposition were studied. The growth of the multilayer films was monitored by absorption spectroscopy and spectroscopic ellipsometry, and the surface morphologies of the resulting films were studied by atomic force microscopy. When the pH of a PTEBS solution was kept at 6 and in the presence of salt, polymer films with maximum thickness were obtained. The multilayer films were also fabricated into photovoltaic cells and their photocurrent responses were measured upon irradiation with simulated air mass (AM) 1.5 solar light. The open‐circuit voltage, short‐circuit current, fill factor, and power conversion efficiency of the devices were 1.2 V, 27.1 μ A cm−2, 0.19, and 6.1×10−3 %, respectively. The high open‐circuit voltage was attributed to the difference in the HOMO level of the PTEBS donor and the LUMO level of the hyperbranched polymer acceptor. A plot of incident photon‐to‐electron conversion efficiency versus wavelength also suggests that the PTEBS/hyperbranched polymer junction is involved in the photosensitization process, in which a maximum was observed at approximately 420 nm. The relatively high capacitance, determined from the measured photocurrent rise and decay profiles, can be attributed to the presence of large counter anions in the polymer film.

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Solution properties of ionomers. 2. Simple salt effect

Cited by 41 publications

References 0 publications

Studies of the solution properties of sulfonated-(styrene-(ethyrene-CO-butylene)-styrene) block copolymer

Studies of the solution properties of sulfonated-(styrene-(ethyrene-CO-butylene)-styrene) block copolymer

Fluorescence and light-scattering studies on the formation of stable colloidal nanoparticles made of sodium sulfonated polystyrene ionomers

Layer‐by‐Layer Deposition of Rhenium‐Containing Hyperbranched Polymers and Fabrication of Photovoltaic Cells

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