Small-angle scattering polymers

Narayanan R A, Thiyagarajaii P, Zhu A J, Ash B J, Shofner M L, Schadler L S, Kumai" S K and Sternstein S S (2007) Nanostructural features in silicarpolyviiiyl acetate nanocomposites characterized by small-angle scattering. Polymer 48 5734-5741. Levresse P, Feke D L and Manas-Zloczower I (1998) Analysis of the formation of bound poly(dimethylsiloxane) on silica, Polymer 39 3919-3924. 

Xiao, Z., li, Y, and Akpahi, YA. (2009) Enabling controlled dispersion in polyethylene nanocomposites using small-angle scattering. Polymer Composites, 30, 559-568. 

An excluded-volume random-coil conformation will be achieved when the solvent quality exceeds the theta point, the temperature or denatu-rant concentration at which the solvent-monomer interactions exactly balance the monomer—monomer interactions that cause the polymer to collapse into a globule under more benign solvent conditions. A number of lines of small-angle scattering—based evidence are consistent with the suggestion that typical chemical or thermal denaturation conditions are good solvents (i.e., are beyond the theta point) and thus that chemically or thermally unfolded proteins adopt a near random-coil conformation. 

Vaia, R. A., Liu, W., and Koemer, H. Analysis of small-angle scattering of suspensions of organically modified montmorillonite Implications to phase behavior of polymer nanocomposites, J. Polym. Sci. B.Polym. Phys. (2003), 41, 3214-3236. 

Small angle scattering experiments confirm that the polymer-bound micelles form distinct necklaces (12). Figure 4 shows the scattering curves of micelles bound to a FEO of M - 1.35E5. Here the shoulder corresponds to a separation between bridged micelles, with a low coordination number and a separation d 3 diameters. 

In polymer research the information which can be obtained from small angle and wide angle scattering is often complimentary (see Sect. 4) which suggests to use a small angle scattering camera for both types of experiments. Practical arguments like the... 

For small angle scattering work and for diffuse patterns, with high intensities as encountered in polymer physics applications, vidicon tube systems are certainly a possibility. 

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