Diffusion of Isolated Polymer Chains in Dilute Solutions

2 Diffusion of Isolated Polymer Chains in Dilute Solutions 

Putting these expressions into Eq. 10.38 then yields 

the mean values of these terms over a long period are introduced so that 

Results for the mean-square displacement along y and z will be the same and, therefore, 

Comparing this result with Eq. 7.52, the diffusivity of the isolated chain is 

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