Solubility and diffusivity are two key factors in the description of mass transport.溶解性和扩散性是描述溶剂在高分子中传质现象的两个关键因素。
The turbulent mass transfer diffusivity profile was also obtained by the simulation.通过模拟，同时得到了湍流传质扩散系数的分布。
In other words the important diffusive motion is migration of the radical segment retarded to the low diffusivity of the whole chain.换言之，重要的扩散移动是自由基链段的迁移减慢为低扩散系数的整个分子链的迁移。
