Effect of excluded volume on the dipole moments of chain molecules
- 1 October 1973
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 59 (7), 3825-3830
- https://doi.org/10.1063/1.1680556
Abstract
Dielectric constants have been determined for dimethylsiloxane chains (CH3)3Si[OSi(CH3)2] x OSi(CH3)3 in the thermodynamically good solvent cyclohexane and in the undiluted state, for degrees of polymerizationx + 1 ranging from 102 to 103, at a number of temperatures in the range 10–60 °C. These data indicate that at constant temperature the dipole moment ratio 〈μ 2 〉/nm 2 (where 〈μ 2 〉 is the mean‐square dipole moment of a chain consisting of n = 2x + 2 bond dipoles of magnitude m) is independent of chain length, as has been predicted for chains of such structural symmetry. Unfortunately, comparison of the experimental values of the dipole moment ratio with those predicted from rotational isomeric state theory is complicated by pronounced specific solvent effects and comparison of experimental and theoretical values of d ln 〈μ 2 〉/dT is also difficult because of the very small magnitude of this coefficient.This publication has 43 references indexed in Scilit:
- Random-Coil Dimensions and Dipole Moments of p-Chlorostyrene ChainsThe Journal of Chemical Physics, 1972
- Random-Coil Dimensions and Dipole Moments of Vinyl Chloride ChainsThe Journal of Chemical Physics, 1972
- Dipole Moments of Dimethylsiloxane Oligomers and Poly(dimethylsiloxane)The Journal of Chemical Physics, 1971
- Dipole Moments of Dimethylsiloxane ChainsThe Journal of Chemical Physics, 1968
- Chain dimensions and dipole moments of poly(trimethylene oxide)Journal of Polymer Science Part B: Polymer Letters, 1966
- Dilute Solution Properties of Linear Polystyrene in Θ-Solvent MediaThe Journal of Chemical Physics, 1963
- Le Comportement Diélectrique des Polymères en Solutions Diluées III. Influence du Solvant sur le Moment Dipolaire et sur la Relaxation DiélectriqueBulletin des Sociétés Chimiques Belges, 1961
- Dielectric properties of polymethyl methacrylate in dilute solution previous resultsJournal of Polymer Science, 1958
- Les propriétés diélectriques des polymères en solution II.—Etude des solutions de polyméthacrylate de méthyle dans le toluèneBulletin des Sociétés Chimiques Belges, 1955
- Dipole Moments of Linear and Cyclic PolymethylpolysiloxanesJournal of the American Chemical Society, 1946