On the Possibility of Different Reactivity of Growing Radicals in Controlled and Free Radical Polymerizations. The Concept of the Reaction Cage in Controlled Radical Polymerization,Macromolecular Theory and Simulations

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On the Possibility of Different Reactivity of Growing Radicals in Controlled and Free Radical Polymerizations. The Concept of the Reaction Cage in Controlled Radical Polymerization
Macromolecular Theory and Simulations ( IF 1.8 ) Pub Date : 2020-12-31 , DOI: 10.1002/mats.202000078
Ryszard Szymanski ₁

Affiliation

In some reversible deactivation radical polymerization (RDRP) processes retention of chain‐end functionality appears to be higher than expected based on the estimated rate constants of propagation and termination. In the recent paper, Ballard and Asua explained this observation using their concept of the probability density functions of the termination reactions, dependent on the initial diffusion stage of radicals being the nearest neighbors. Here, a new explanation of the observed phenomenon is proposed, alternative to their proposition. The presented hypothesis assumes interaction of growing radical with the RDRP deactivator, resulting in two types of radicals.

中文翻译：

关于受控自由基聚合和自由基聚合中增长自由基的不同反应性的可能性。受控自由基聚合反应笼的概念

在某些可逆的失活自由基聚合（RDRP）过程中，链端官能团的保留率似乎高于基于估计的传播和终止速率常数的预期值。在最近的论文中，巴拉德和阿苏阿使用终止反应的概率密度函数的概念来解释这一现象，这取决于自由基的初始扩散阶段是最接近的邻居。在这里，提出了一种新的解释，以观察到的现象，而不是它们的主张。提出的假设假设增长的自由基与RDRP减活剂相互作用，从而产生两种自由基。

更新日期：2020-12-31

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