进一步的研究表明，低1，2-链节含量对应着较低的分子链内旋转势垒和内旋转异构化能。

It has shown that less 1, 2-unit content corresponds to lower potential barrier of internal rotation and hence to lower energy of rotational isomerization.

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在旋转异构态理论基础上，建立双侧基高分子链均方旋转半径的计算公式，由此得到聚甲基苯乙烯的均方旋转半径特征比与链长的关系，计算结果与实验数值十分一致。

Using the rotational isomeric state theory, the mean square radius of gyration < S 2> and its temperature coefficient for the polymer chain with large side groups are derived.

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还对分子内的受阻旋转、活泼氢状态以及互变异构体的动力学现象作了讨论。

The states of active hydrogens, the hindered rotation within molecules and the kinetic phenomena of tautomerism have also been discussed.

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