CORRELATION OF STRUCTURE, MOBILITY, AND MORPHOLOGICAL INFORMATION IN HETEROGENEOUS POLYMER MATERIALS BY 2-DIMENSIONAL WIDELINE-SEPARATION NMR-SPECTROSCOPY

A novel version of the two-dimensional heteronuclear experiment, achieving H-1 wideline separation (WISE), is presented. It allows for the correlation of mobility and structure in organic solids. Differences of molecular dynamics are probed by H-1 wideline shapes, which are separated in the second dimension by C-13 chemical shifts. With a mixing time inserted before cross polarization from H-1 to C-13, H-1 spin diffusion allows one to determine the mobility at interfaces and to measure domain sizes approximately. The technique is demonstrated on poly(styrene)-poly(siloxane) block copolymers and on a blend of poly(styrene) and poly(vinyl methyl ether), where nano-heterogeneity with respect to the mobility is found. The detection of phenyl flips in glassy polymers is also demonstrated.