Scattering of light angular dependence

Properties which depend on the size of the chain, for example, viscosity and angular dependence of light scattering, get strongly affected by chain expansion. The viscosity may even increase markedly as polymer concentration decreases, the increase in viscosity results in an increase in the degree of... 

Figure 3-22 The angular dependence of light-scattering intensity with nonpolarized and polarized incident light for small particles (A) and the angular dependence of light scattering with nonpolarized light for larger particles (B).

Angular dependence of light scattered from concentrated solutions of the bovine enzyme is characteristic of scattering from a rod-shaped polymer (58,102). Studies of the small-angle X-ray diffraction (106) and viscosity (107) of enzyme solutions as a function of protein concentration have also shown that the enzyme aggregates to form linear polymers. 

With very short chains the coil becomes a poor approximation. The macromolecule in such a case is better represented by a slightly bent rod. Plotted as a function of M the intrinsic viscosity exhibits first a nearly quadratic dependence on and the sedimentation coefficient in some cases a negative intercept at M = The angular dependence of light scattering... 

The term (0) describes the angular variation of light scattered at constant concentration (Kratochvil 1972). The form of P(0) 1 is dependent upon the size and shape of the scattering particles and provides the basis for their determination. Under the limiting condition of small angles, P(0) 1 may be expressed in the form of Eq. (5) ... 

Kerker, M. et ah. Determination of particle size by the minima and maxima in the angular dependence of the scattered light. Range of validity of the method, J. Colloid Set, 19, 193-200, 1964. Mandelbrot, B., The Fractal Geometry of Nature, Freeman, San Franciso, CA, 1983. 

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