When the molecular weight of polymers was low, the oligomer cannot adopt stable helical conformation;
结果表明，当分子量较低时，聚合物不能形成稳定的螺旋结构；
Moreover, the stability of helical conformation of poly (phenylacetylene) decreased with the increasing temperature.
聚苯乙炔螺旋构象的稳定性随着温度的提高而降低。
In general, bulky side-chain and hydrogen bonding are in favor of the formation of stable helical conformation for polymers, which endows them with high optical property and some special performance.
许多文献报道证实，庞大的侧基或具有形成氢键能力的基团有利于聚合物主链形成稳定的螺旋构象，从而赋予材料高度的旋光活性和某些特殊功能。
The utility model is capable of simply and quickly detecting whether the joggle between the helical gear and the output shaft gear is satisfied and has simple conformation and convenient usage.
本实用新型可以简单快速的检测出斜齿轮与输出轴齿轮啮合是否符合要求，结构简单，使用方便。
The utility model is capable of simply and quickly detecting whether the joggle between the helical gear and the output shaft gear is satisfied and has simple conformation and convenient usage.
本实用新型可以简单快速的检测出斜齿轮与输出轴齿轮啮合是否符合要求，结构简单，使用方便。
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