Polystyrene latex film is a model system for the study of interdiffusion in polymers. Small-angle neutron scattering (SANS) and a direct nonradiative energy transfer technique (DET) are widely used to study the interdiffusion of polymers in latex film. SANS and DET analysis were performed on exactly the same samples to remove any artifacts originating from sample differences. SANS and DET data provide various insights into the latex film formation process and mechanical strength development, especially in the very early time region. The interface shape in the sintered film was found to be sharp. The physical relaxation of deformed particles in sintered films was monitored by SANS while molecular interdiffusion was measured by DET without interference of physical relaxation. The diffusion coefficients obtained from SANS were slightly higher in most cases, within a factor of two than that determined by DET.
Proceedings Title: American Chemical Society; Division of Polymer Chemistry, Meeting | | | American Chemical Society (ACS)
Issue: No. 1
Conference Dates: March 1, 2000
Conference Title: Polymer Preprints
Pub Type: Conferences
DET, diffusion, latexes, polystyrene, SANS