Configurational Properties of Poly( ethylene oxide)and Poly( tetramethylene oxide)'

Tipo de material: Texto

TextoSeries ; Journal of Physical Chemistry B, 71(12), p.4007-4011, 1967Trabajos contenidos:

Bak, K
Elefante, G
Mark, J.E

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Resumen: Mean-square dipole moments of poly(ethy1ene oxide)and poly(tetramethy1ene oxide)chains from 20 to 60" have been determined from dielectric constant measurements on dilute solutions of the polymers in benzene. These moments and their temperature coefficients are in good agreement with values predicted using rotational isomeric state models for these chain molecules. In addition, the temperature dependence of the unperturbed dimensions of the poly(tetramethy1ene oxide)chain has been determined from force-temperature measurements on cross-linked networks; again, good agreement between theory and experiment is obtained.

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Mean-square dipole moments of poly(ethy1ene oxide)and poly(tetramethy1ene oxide)chains from 20 to 60" have been determined from dielectric constant measurements on dilute solutions of the polymers in benzene. These moments and their temperature coefficients are in good agreement with values predicted using rotational isomeric state models for these chain molecules. In addition, the temperature dependence of the unperturbed dimensions of the poly(tetramethy1ene oxide)chain has been determined from force-temperature measurements on cross-linked networks; again, good agreement between theory and experiment is obtained.

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