Epimerization of vinyl polymers to stereochemical equilibrium. 1. Theory

Epimerization of vinyl polymers to stereochemical equilibrium. 1. Theory
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乙烯基聚合物差向异构化至立体化​​学平衡。

DOI:
10.1021/ma50004a012
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发表时间:
1981
期刊:
影响因子:
5.5
通讯作者:
U. Suter
U. Suter
中科院分区:
化学1区
文献类型:
--
作者:
U. Suter

文献摘要

被引文献

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弗洛里的乙烯基聚合物立体化学平衡理论得到了推广。任何长度 x 的链中任何长度的立体化学序列 (m-ads) 的平衡频率都可以通过新公式获得;计算出的频率是整个链长度上的平均值。给出了直到m= 5(五元组)的序列的一些数值结果,并且证明平衡时乙烯基链中的二元组分布不遵循任何类型的单向统计,例如任何阶马尔科夫。
Flory’s theory of stereochemical equilibrium in vinyl polymers is generalized. Equilibrium frequencies for stereochemical sequences of any length (m-ads) in chains of any length x can be obtained with the new formulation; the calculated frequency is averaged over the entire length of the chains. Some numerical results for sequences up to m= 5 (pentads) are presented, and it is demonstrated that the dyad distribution in vinyl chains at equilibrium does not follow any type of unidirectional statistics, eg, any order Markoff.