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采用旋转异构态模型，用ＭｏｎｔｅＣａｒｌｏ方法计算了聚二甲基硅氧烷（Ｐｏｌｙｄｉｍｅｔｈｙｌｓｉｌｏｘａｎｅ）链考虑侧基（ＣＨ３）的均方通转半径。其结果为＜Ｓ２＞／Ｍ＝７．８５×１０－２：（ｇ·ｍｏｌ）与实验结果（７．７×０．３）×１０－２（ｇ·ｍｏｌ）符合得很好。这种方法可进一步研究高分子链的构象性质。
Using the rotational isomerism model, Monte-Carlo method was used to calculate the mean square radius of transition of side groups (CH3) in polydimethylsiloxane chains. The result is /M=7.85 × 10-2: (g · mol) which is in good agreement with the experimental result (7.7 × 0.3) × 10-2 (g · mol). This method can further study the conformational properties of the polymer chain.