129Xe NMR spectra of xenon in zinc-exchanged zeolites have been calculated assuming a macroscopic inhomogeneity resulting from a distribution of adsorption site concentrations. The experimentally observed characteristics of the lines such as line widths and shapes are qualitatively reproduced, as we
129Xe line widths in block copolymers
โ Scribed by Sydney K. Brownstein; J. E. L. Roovers; D. J. Worsfold
- Publisher
- John Wiley and Sons
- Year
- 1988
- Tongue
- English
- Weight
- 187 KB
- Volume
- 26
- Category
- Article
- ISSN
- 0749-1581
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โฆ Synopsis
Separate lZ9Xe lines are observed for Xe gas dissolved in the different regions of polystyrene-polyisoprene block copolymers. The variation in line width with copolymer molecular weight may be explained by diffusion between the two different phases.
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Institute of Macromolecular Compounds o f the Academy o f Sciences of the USSR, Leningrad, USSR \* Abstract -A structon model of supercrystals f o r describing tile dynamic properties and multiple phese transitions of superlattices,formed in systems of block copolymers with segregated domains,is app