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Role of chain length in degradation process (chain breakdown)

机译:链长在降解过程中的作用(链断裂)

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The role of molecular weight of a chain in the chain breakdown in diluted solution at a constant concentration of chain molecules and constant temperature is discussed theoretically using the methods of the theory of the activated complex and kinetics of cooperative processes. The reaction starts at the certain molecular weight of the chain. The chain breakdown is the flat increasing function of the chain molecular weight. This function has a limit when chain molecular weight approaches infinity. Such dependence is explained by the increase of flexibility (following two theories) and increase of extra entropy of molecules of different sizes (following kinetics of cooperative processes. Unequal reactivity of chemically identical active centers links to the dependence of chain flexibility on the location of the more flexible part (place of reaction) of the chain. (C) 2002 Wiley Periodicals, Inc. [References: 17]
机译:使用活化配合物理论和协同过程动力学的方法,从理论上讨论了链的分子量在稀释溶液中在恒定浓度的链分子和恒定温度下的链断裂中的作用。反应从链的特定分子量开始。链断裂是链分子量的平坦增加函数。当链分子量接近无穷大时,此功能受到限制。这种依赖性可以通过增加柔性(遵循两种理论)和增加不同大小分子的额外熵(遵循协同过程的动力学)来解释。化学上相同的活性中心的不等反应性取决于链柔性对分子位置的依赖。 (C)2002 Wiley Periodicals,Inc. [引用:17]

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