Configuration‐Dependent properties of the poly(dimethylsilmethylene) chain in the third‐order interaction approximation

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<jats:title>Abstract</jats:title><jats:p>On the basis of rotational isomeric state theory, first‐order, second‐order, and third‐order conformation energies E<jats:sub>σ</jats:sub>, E<jats:sub>ω</jats:sub> and E<jats:sub>φi</jats:sub> respecively, are calculated for poly(dimethylsilmethylene) (CH<jats:sub>2</jats:sub>—Si(CH<jats:sub>3</jats:sub>)<jats:sub>2</jats:sub>)<jats:sub>x</jats:sub> using the Lennard–Jones potential function. With the third‐order interaction included, the characteristic ratios and temperature coefficients 〈<jats:italic>R</jats:italic><jats:sup>2</jats:sup>〉<jats:sub>0</jats:sub> and 〈μ<jats:sup>2</jats:sup>〉<jats:sub>0</jats:sub> are obtained: <jats:disp-formula> </jats:disp-formula> These results are in satisfactory agreement with the experimental data previously reported. © 1993 John Wiley & Sons, Inc.</jats:p>

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