On ionic copolymerization
On ionic copolymerization
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离子共聚
DOI：
10.1002/pol.1952.120080105
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发表时间：
1952
影响因子：
3.4
通讯作者：
Y. Landler
中科院分区：
文献类型：
--
作者：
Y. Landler
< jats: title> 摘要< jats: p>< jats: list list-type="explicit-label">< jats: list-item>< jats: p> 离子共聚中单体的反应性是烯属双键上取代基极性的函数。< jats: list-item>< jats: p> 非交替趋势是通过在传播步骤中不存在交替极性效应来解释的。< jats: list-item>< jats: p> 结果似乎表明，在此处研究的单体的情况下，不存在任何其他选择性效应（< jats: italic> 例如，空间），此外，源自这些不同单体的碳正离子的反应性是相同的。因此建议：< jats: list-item>< jats: p> 可以应用原始Wall方程，< jats: italic> dM< jats: sub> 1/< jats: italic> dM< jats: sub> 2= α (< jats: italic> M< jats: sub> 1/< jats: italic> M< jats: sub> 2)。
< jats: title> Abstract< jats: p>< jats: list list-type=" explicit-label">< jats: list-item>< jats: p> The reactivity of monomers in an ionic copolymerization is shown to be a function of the polarity of the substituent on the ethylenic double bond.< jats: list-item>< jats: p> The nonalternating tendency is explained by the absence of an alternating polar effect during the propagation step.< jats: list-item>< jats: p> The results seem to indicate in the case of the monomers studied here the absence of any other selective effects (< jats: italic> eg, steric) and furthermore that the reactivity of the carbonium ions derived from these different monomers is the same. Therefore it is suggested that:< jats: list-item>< jats: p> The original Wall equation,< jats: italic> dM< jats: sub> 1/< jats: italic> dM< jats: sub> 2= α (< jats: italic> M< jats: sub> 1/< jats: italic> M< jats: sub> 2) may be applied.