发展并详细解释了溶质在聚合物中的纯菲茨基扩散理论。提出了独特的方法，可用于快速预测疏水性有机化学品在纯菲茨基条件下穿透塑料水管的时间，而无需大量数学操作。结果表明，结果取决于假设的初始边界条件、渗透物质的外部和内部活性之间的差异、溶质在管壁和管内水之间的平衡分配、溶质在塑料中的扩散率以及管道尺寸。 详细讨论了该理论的局限性，并给出了四组有机化学品的示例解决方案，然后将其与管道渗透事件进行定性比较。包括21个参考文献、表格和图表。

The theory of pure-Fickian diffusion of solutes through polymers is developed and explained in detail. Unique methods are presented that may be used to predict rapidly and without extensive mathematical manipulation the time in which a hydrophobic organic chemical would penetrate plastic water pipes under pure-Fickian conditions. It is demonstrated that the results are dependent on the initial boundary conditions assumed, the difference between the external and internal activity of the permeating substance, the equilibrium partitioning of the solute between the pipe wall and the water held inside the pipe, the diffusivity of the solute in the plastic, and the pipe dimensions. Limitations to the theory are discussed in detail and example solutions are presented for four groups of organic chemicals, which are then compared qualitatively with a pipe permeation incident. Includes 21 references, tables, figures.