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首页> 外文期刊>Macromolecular theory and simulations >The quenched instationary polymerization system, 2 - Derivation of the radical and polymer chain length distributions for an incomplete pre-effect
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The quenched instationary polymerization system, 2 - Derivation of the radical and polymer chain length distributions for an incomplete pre-effect

机译：淬灭的平稳聚合体系，2-自由基和聚合物链长分布的推导，用于不完全的预效应

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摘要

An instationary polymerization system with constant chain initiation is prevented from attaining a final stationary state by the occurrence of a highly efficient quench reaction which deactivates all radicals present at a certain time t(in). The set of differential equations was used to derive the radical spectrum as a function of polymerization time. These, the numerically calculated polymer chain length distributions and the convolutes of both were analyzed in order to determine the chain lengths of the extrema of the first anf the second derivatives. These values were found to be proportional to k(p)[M]t(in). The values were recalculated by using already derived correction factors anf the deviations from the input parameter were on most cases smaller than 1% but became more pronounced as soon as the polymer concentration was bigger than the total radical concentration. [References: 20]
机译：通过发生高效的猝灭反应，可以使具有恒定链引发作用的平稳聚合反应体系保持最终的静止状态，该猝灭反应会使在特定时间t（in）存在的所有自由基失活。使用一组微分方程来推导自由基光谱与聚合时间的关系。为了确定一阶导数和二阶导数的极值，对这些数值计算得出的聚合物链长分布和两者的卷积进行了分析。发现这些值与k（p）[M] t（in）成正比。通过使用已经得出的校正因子重新计算该值，并且在大多数情况下，与输入参数的偏差小于1％，但是一旦聚合物浓度大于总自由基浓度，该值就会变得更加明显。 [参考：20]

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