APPLICATION OF A 2-DIMENSIONAL H-1-C-13 HETERONUCLEAR CORRELATION EXPERIMENT IN SOLIDS TO POLYMER BLENDS

Miscibility and inter-polymer hydrogen bonding of poly(methyl acrylate )/poly(vinyl phenol)(PMA/PVPh) blend are studied by a two-dimensional H-1-C-13 heteronuclear correlation experiment in solids. For a short s pin-diffusion time of 0.2ms, there are no apparent correlation peaks b etween the different polymers. After a long spin-diffusion time of 1ms , there appears a correlation peak between the aromatic protons of PVP h and the carbonyl carbon of PMA. The inter-polymer correlation peak i s a clear evidence of miscibility on a molecular level and is consiste nt with the existence of an inter-polymer hydrogen bonding.