Dipole Moments of Dimethylsiloxane Oligomers and Poly(dimethylsiloxane)
dc.contributor.author | Sutton, C. | en_US |
dc.contributor.author | Mark, J. E. | en_US |
dc.date.accessioned | 2010-05-06T20:37:51Z | |
dc.date.available | 2010-05-06T20:37:51Z | |
dc.date.issued | 1971-06-15 | en_US |
dc.identifier.citation | Sutton, C.; Mark, J. E. (1971). "Dipole Moments of Dimethylsiloxane Oligomers and Poly(dimethylsiloxane)." The Journal of Chemical Physics 54(12): 5011-5014. <http://hdl.handle.net/2027.42/69456> | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/69456 | |
dc.description.abstract | Dielectric constants at 20, 30, 40, and 50°C have been determined for pure liquid dimethylsiloxane oligomers (CH3)3Si–[OSi(CH3)2]xOSi(CH3)3 having chain lengths corresponding to x = 3,5,7,and9x=3,5,7,and9. Mean‐square dipole moments 〈μ2〉〈μ2〉, calculated from the Onsager equation, are in good agreement with predicted values based on a rotational isomeric state model with neighbor dependence and chain conformational energies obtained in an independent analysis of the random‐coil dimensions of such chains. In addition, the observed temperature coefficients of 〈μ2〉〈μ2〉 are in qualitative agreement with calculated results for the stated range of xx. An experimental value of the ratio 〈μ2〉 / nm2〈μ2〉∕nm2 (where nn is the number of bond dipoles, each of magnitude mm) in the limit of large xx is estimated from published data on the pure liquid polymer at 25°C. This tentative result is in fair agreement with theory; agreement is improved if the large specific solvent effect previously observed for this polymer is interpreted as being primarily due to the effect of the dielectric constant of the medium on the Coulombic contribution to the conformational energy. | en_US |
dc.format.extent | 3102 bytes | |
dc.format.extent | 311773 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.publisher | The American Institute of Physics | en_US |
dc.rights | © The American Institute of Physics | en_US |
dc.title | Dipole Moments of Dimethylsiloxane Oligomers and Poly(dimethylsiloxane) | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48104 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/69456/2/JCPSA6-54-12-5011-1.pdf | |
dc.identifier.doi | 10.1063/1.1674790 | en_US |
dc.identifier.source | The Journal of Chemical Physics | en_US |
dc.identifier.citedreference | J. E. Mark and P. J. Flory, J. Am. Chem. Soc. 86, 138 (1964). | en_US |
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dc.identifier.citedreference | J. E. Mark, J. Chem. Phys. 49, 1398 (1968). | en_US |
dc.identifier.citedreference | P. J. Flory, Statistical Mechanics of Chain Molecules (Interscience, New York, 1969). | en_US |
dc.identifier.citedreference | These samples were generously provided by Dr. T. Williams of the Union Carbide Corp. and Dr. J. Saam of the Dow‐Corning Corp. | en_US |
dc.identifier.citedreference | Constructed by the Wissenschaftlich‐Technische Werkstätten, GMBH, Weilheim Oberbayern, Germany; available in the United States from the Kahl Scientific Instrument Co., El Cajon, Calif. | en_US |
dc.identifier.citedreference | C. P. Smyth, Dielectric Behavior and Structure (McGraw‐Hill, New York, 1955), p. 405. | en_US |
dc.identifier.citedreference | L. Onsager, J. Am. Chem. Soc. 58, 1486 (1936). | en_US |
dc.identifier.citedreference | There are two errors in the description of this calculation in Ref. 11: a unit matrix of order three should replace the last statistical‐weight matrix UaUa appearing in Eq. (6) and should also replace the UaUa appearing in the last generator matrix GaGa in Eq. (8). | en_US |
dc.identifier.citedreference | American Institute of Physics Handbook, edited by D. E. Gray et al. (McGraw‐Hill, New York, 1963). | en_US |
dc.owningcollname | Physics, Department of |
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