Electrolytic conductivity of lower molecular weight α‐hydro‐ω‐hydroxypoly[oxy(hydroxyphosphoryl)oxytrimethylene]

Wódzki, Romuald; Katużyński, Krzysztof

doi:10.1002/marc.1984.030050705

Cited by 14 publications

(4 citation statements)

References 9 publications

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“…The average degree of polymerization (r~) has been determined by the end group method [7]. The preparation of PPP in hydrogen and mixed hydrogen-magnesium (a --0.5) forms of water content from 2 to 18 moles of water per one mole of phosphate groups (n) were described in our previous paper [1].…”

Section: Methodsmentioning

confidence: 99%

Pulsed NMR studies of translational mobility of polymer molecules in polydialkylphosphate gels

Litowska¹

1986

Colloid & Polymer Sci

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Abstract:The translational mobility of polypropylenephosphate (PPP) molecules has been studied by the NMR pulsed field gradient technique. The translational diffusion of long chain polymer molecules of polymerization degree r~ > 20 may be neglected, in NMR measurements, on account of their rigidity. The self-diffusion coefficient of short chain polymer molecules (r~ = 8) in PPP gels (/)s = 3.10 -8 cm2/s) is about two orders of magnitude lower than that of water molecules in gels.

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Section: Methodsmentioning

confidence: 99%

Pulsed NMR studies of translational mobility of polymer molecules in polydialkylphosphate gels

Litowska¹

1986

Colloid & Polymer Sci

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“…The polymerization product was converted into its acidic form using N204 in CH2C12 solution as an oxydizing agent. The details of synthesis, fractionation and determination of n were described elsewhere [13]. Alcohol and/or water soluble oligomeric fractions of the average degree of polymerization ofn < 10 and 10 < n < 20, respectively, and nonsoluble polymeric fraction of n > 20 were obtained.…”

Section: Methodsmentioning

confidence: 99%

Spectral studies on the structure and monovalent cation binding to poly(1,3-propylene phosphate) ? a synthetic analogue of natural teichoic acids

Ostrowska-Czubenko

1989

Colloid & Polymer Sci

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A poly(1,3-propylene phosphate), (PPP), which can be considered as a synthetic analogue of naturally occurring teichoic acids, has been studied with infrared spectroscopy. Infrared spectra of PPP in acidic and alkali metal forms have been analyzed in detail and the conclusions concerning intermolecular interactions between phosphate diester groups and the monovalent cation binding to PPP of a different degree of polymerization (n) have been drawn out. It has been shown that in anhydrous PPP, acidic groups are extensively hydrogen bonded. The process of association of phosphate diester groups is rather complex, especially in the samples of lower n. The role of H-bonds in some solution properties of high-molecular PPP samples has been discussed.

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“…There are a number of commercially available membranes based on polymeric perfluorosulfonic acids, which saturated with water can reach conductivity levels of 10 -2 −10 -1 S·cm -1 at the cell's operating temperature . Many attempts were also undertaken to obtain highly conducting solid polyelectrolytes in the form of lithium salts for making safe lithium rechargeable batteries, which are one of the most promising candidates for the future power source system. − In these systems the role of the solvent solvating lithium cations was played by polyether macromolecules, particularly high molecular weight poly(ethylene oxide) or oxyethylene units incorporated into the polyelectrolyte structure. However, none of these electrolytes showed sufficient ionic conductivity to allow a reasonable current density in a solid-state battery.…”

Section: Introductionmentioning

confidence: 99%

Highly Conducting Lithium Polyelectrolytes Based on Maleic Anhydride−Styrene Copolymers

et al. 1998

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Comblike polyelectrolytes comprising immobilized carboxylic anions and poly(oxyethylene) (OCH2CH2) n side chains of various length were obtained from the reaction of appropriate lithium alcoholates with maleic anhydride−styrene alternating copolymers. These materials may be fabricated as films of ambient temperature conductivity in the range of 10-9−10-6 S·cm-1, depending on the side-chain length. The conductivity values increase by 2−3 orders of magnitude after the addition of strong polar plasticizers such as dimethyl sulfoxide and propylene carbonate. A further increase in conductivity was observed after the complexation of carboxylic anions by BF3. On the basis of 13C NMR studies and 7Li NMR relaxation times of lithium carboxylates, it was found that the anion complexing agent reduces ion pairing in polyelectrolytes more effectively than cation-solvating solvents. The possible conduction mechanism in the solid and gel polyelectrolytes is discussed.

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Electrolytic conductivity of lower molecular weight α‐hydro‐ω‐hydroxypoly[oxy(hydroxyphosphoryl)oxytrimethylene]

Cited by 14 publications

References 9 publications

Pulsed NMR studies of translational mobility of polymer molecules in polydialkylphosphate gels

Pulsed NMR studies of translational mobility of polymer molecules in polydialkylphosphate gels

Spectral studies on the structure and monovalent cation binding to poly(1,3-propylene phosphate) ? a synthetic analogue of natural teichoic acids

Highly Conducting Lithium Polyelectrolytes Based on Maleic Anhydride−Styrene Copolymers

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