Small angle x-ray scattering of an ordering aggregation.

We present a new correlation function in the form of γ(r)=r(Df-D) exp(-r/a0)cos(br) to describe the essential features of aggregate structure. The scattered intensity distribution corresponding to this correlation function was obtained. Compared with existing models, the new scattering formula can predict a scattering peak in a finite wavevector and control the scattered intensity decay in larger wave vectors. The experimental scattering patterns obtained from polydimethylsiloxane/paraffin liquid mixtures were tested well by the new model. © 1996 American Institute of Physics. [ABSTRACT FROM AUTHOR]