LIGHT-SCATTERING CHARACTERIZATION OF POLY(TETRAFLUORETHYLENE)

Laser light scattering including angular dependence of absolute integrated scattered intensity and of the spectral distribution has been used successfully, for the first time, to characterize a tetrafluoroethylene polymer in oligomers of poly(chlorotrifluoroethylene) at 340 degree C. Precise measurements of the intensity-intensity time correlation function permit us to make a Laplace inversion using a variety of techniques including a multiexponential singular value decomposition (MSVD), regularized inversion of Laplace integral equation (RILIE), and the CONTIN algorithm developed by S. W. Provencher. We were able to obtain an estimate of the normalized characteristic line-width distribution which could be reduced to a distribution of translation diffusion coefficient at infinite dilution, independent of the method used in the Laplace inversion.