Light scattering Gaussian chain

The incorporation of non-Gaussian effects in the Rouse theory can only be accomplished in an approximate way. For instance, the optimized Rouse-Zimm local dynamics approach has been applied by Guenza et al. [55] for linear and star chains. They were able to obtain correlation times and results related to dynamic light scattering experiments as the dynamic structure factor and its first cumulant [88]. A similar approach has also been applied by Ganazzoli et al. [87] for viscosity calculations. They obtained the generalized ZK results for ratio g already discussed. 

Method II Using Light Scattering Data (Gaussian Chain Approximation Method)... 

Benoit H., Doty P., Light scattering from non-gaussian chains, J. Phys. Chem., 57, 1953, 958—963. 

I or t.h( scattered light intensity, this analysis uses a dependence of the Equation 89 type. Turning to the Hdwards-type continuous Gaussian chains will play a part in a further development of polymer theory. 

It can be shown that equation (3) is not only valid for the Gaussian chain but also for particles with an arbitrary shape as long as q Rg) 1. Considering the interparticle interference between the scattered lights, Debye (10) showed in 1947 that the concentration dependence can be virial expanded as a power series in the concentration, the combination of which with equations (2) and (3) leads to... 

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