Zero-angle scattering polymer blend

As neutron scattering measures the fluctuation in the scattering length density of a system, it is an ideal tool to monitor the presence and growth of concentration fluctuations in a polsrmer/polymer mixture. In fact, the inverse of the zero-angle scattering, l q=0), is proportional to the second derivative of the free energy of the mixture with respect to the blend concentration, which is the osmotic compressibility of a mixture. Theories of cooperative phenomena show that /" (q=0) (T - (60) and thus the determination of extrapo-... 

Stribeck N (1996) Small-angle X-ray scattering functions in the vicinity of zero scattering angle with an application to polymer blends, Macromolecides 29 7217-7220. 

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