1994
DOI: 10.1021/ie00034a034
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Structure and Thermodynamics in Associating Model Ionomer Solutions

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Cited by 7 publications
(9 citation statements)
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References 48 publications
(60 reference statements)
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“…This picture of ionic aggregation is consistent with the results obtained from this study that support the formation of self-loops in the dilute regime with extension of chains due to bridging between different micelles as concentration increases. It should be noted that the fact that the chain dimensions measured increase with concentration and are larger than those expected from a cyclization of the polymer chains is consistent with our observations from total SANS 14 and dynamic light scattering measurements . These results showed that the aggregates were in an extended rather than a contracted conformation as revealed by the rather small fractal dimension of the aggregates.…”
Section: Data Evaluation and Analysissupporting
confidence: 90%
See 1 more Smart Citation
“…This picture of ionic aggregation is consistent with the results obtained from this study that support the formation of self-loops in the dilute regime with extension of chains due to bridging between different micelles as concentration increases. It should be noted that the fact that the chain dimensions measured increase with concentration and are larger than those expected from a cyclization of the polymer chains is consistent with our observations from total SANS 14 and dynamic light scattering measurements . These results showed that the aggregates were in an extended rather than a contracted conformation as revealed by the rather small fractal dimension of the aggregates.…”
Section: Data Evaluation and Analysissupporting
confidence: 90%
“…It should be noted that the fact that the chain dimensions measured increase with concentration and are larger than those expected from a cyclization of the polymer chains is consistent with our observations from total SANS 14 and dynamic light scattering measurements. 52 These results showed that the aggregates were in an extended rather than a contracted conformation as revealed by the rather small fractal dimension of the aggregates.…”
Section: Single Chain Conformation Of Telechelic Ionomer Solutionsmentioning
confidence: 87%
“…To verify large cations reduce physical cross-linking, or ionic aggregation, we turn to X-ray scattering, a common tool for identifying ionic aggregates. , Ionic aggregation can be identified through the wavevector q of ionomer peaks, where q = (4π/λ) sin(θ/2), with X-ray wavelength, λ and scattering angle, θ. Typical ionomers with similar ion contents have been reported to show peaks near q = 0.15−0.2 Å −1 corresponding to Bragg spacing of d = 2π/ q ≈ 3 nm between ion aggregates. , Figure shows the X-ray results for our polyester ionomers shifted vertically for clarity. The sodium ionomer has the most scattering in the 0.02 Å −1 < q < 0.17 Å −1 range, suggesting that the ionomer with Na counterions has the most extensive ion aggregation.…”
Section: Resultsmentioning
confidence: 99%
“…The aggregation results in an increase in viscosity by orders of magnitude over that of unneutralized materials which makes ionomers useful as viscosity enhancers in low-polarity solvents. This thickening ability in the semidilute region depends on the ion content, neutralizing cation, and solvent quality. ,, Further, nonpolar ionomer solutions often exhibit shear-thickening and shear-thinning behavior, making them useful as rheology modifiers.…”
Section: Introductionmentioning
confidence: 99%