ISSN:
0887-6266
Keywords:
rotational isomeric state theory
;
third-order interaction approximation
;
conformational energy
;
PDMSM chain
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
On the basis of rotational isomeric state theory, first-order, second-order, and third-order conformation energies Eσ, Eω and Eϕi respecively, are calculated for poly(dimethylsilmethylene) (CH2 - Si(CH3)2)x using the Lennard-Jones potential function. With the third-order interaction included, the characteristic ratios and temperature coefficients 〈R2〉0 and 〈μ2〉0 are obtained: \documentclass{article}\pagestyle{empty}\begin{document}$$\begin{array}{c} {\langle R^2 \rangle _0 /nl^2 = 5.4,\,\, d\ln \langle R^2 \rangle _0 /dT = \left(0.11 \pm 0.01\right) \times 10^{ - 3} \deg ^{ - 1} } \\ {\langle \mu ^2 \rangle _0 /nm^2 = 0.34,\,\,d\ln \langle \mu ^2 \rangle _0 /dT = \left( - 0.09 \pm 0.01\right) \times 10^{ - 3} \deg ^{ - 1} } \\ {\left(n = 2x, n \ {\rm is a number of bonds} \right).} \\ \end{array}$$\end{document} These results are in satisfactory agreement with the experimental data previously reported. © 1993 John Wiley & Sons, Inc.
Additional Material:
5 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/polb.1993.090310410
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