聚二甲基硅烷与聚二甲基硅氧烷链特征比分析比较

A Comparison of Characteristic Ratio of Poly (dimethylsilmethylene) with Poly(dimethylsiloxane)

应用构象统计方法和改进的侧基旋转异构态模型,推导了对称取代基链的均方回转半径特征比<S2>2xl2公式,可研究聚二甲基硅烷链的柔顺性,根据特征比与链长的关系,得到聚二甲基硅烷链长链特征比值094,结果还与聚二甲基硅氧烷链前期计算值作了比较.

With the conformational statistical method theory and the improved rotational isomeric state model of large side groups, the mean_square radius of gyration of the symmetrically substituted polymer chain are deduced, by which the flexibility of poly(dimethylsilmethylene) (PDMSM) may be investigated. According to the formula of ratio vs. chain length, the ratio of the large PDMSM are calculated 0 94, which is compared with that of poly(dimethylsiloxane) from our previous calculation.