Bayreuth 1998 – scientific programme
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PO: Polymerphysik
PO 4: Poster: Molekulare Dynamik
PO 4.16: Poster
Wednesday, March 11, 1998, 15:25–17:15, P1
1H-Spin Diffusion in Water Containing Latices — •F. Mellinger1, M. Wilhelm1, K. Landfester1, H. W. Spiess1, J. Pakusch2, A. Haunschild2, and R. Voelkel2 — 1MPI f. Polymerforschung, 55099 Mainz — 2BASF AG, 67056 Ludwigshafen
1H-spin diffusion solid states NMR provides structural information about heterogeneous polymers. It combines the information of 1H-spectra with respect to mobilities with spatial information by analysing the time dependent 1H-spin magnetisation behaviour. Here spin-diffusion experiments are used to elucidate global structures in complex heterogeneous polymer latexes. Remagnetisation effects are observed during spin diffusion experiments in a three component system with one rigid and two different soft phases. As these effects can only occur when the two magnetisation source regions are spatially separated, it facilitates the interpretation of spin diffusion data for structure investigation of latex structures. The final film still contains water. Films were dried to prevent interdiffusion and to retain the original latex structure. We demonstrate that the latex possesses an inverse structure, where the second step copolymere polymerises inside the seed particle.