Non-Dimensional Form of Dynamic Equation

It is convenient to use the time scale r, which is called the Rouse characteristic relaxation time and is a combination of parameters of the theory 

The inertial effects can be neglected (to = 0), so that the above system of equations can be written as 

Relations (3.50) and (3.51) are being satisfied, if the random processes are given as 

Dynamics of a single macromolecule in an entangled system is defined by the system of non-linear equations (3.52)-(3.54), containing some phenomenological parameters, which will be identified later. 

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