The dependence of chain scission and racemization on temperature results from molecular motion, "cage effect" and sterichindrance during recombination.
分子量降低和消旋作用对温度的依赖性，是由于分子运动和笼罩效应以及重合的空间位阻效应所致。
2
At the same time, we have also investigated the influence of the electric effect and sterichindranceeffectof the substituents to the yields and regioselectivity.
同时，我们还研究了取代基团的电子效应和位阻效应对反应产率和区域选择性的影响。
3
The dispersing ability of SSHE as cement dispersant also came from sterichindranceeffect and long side chain contributed to steric hindrance in a certain degree.