Investigation of phase structure of blends of poly[(N-ethylcarbazol-3-yl)methyl methacrylate] and poly{2-[(3,5-dinitrobenzoyl)oxy]ethyl methacrylate} using H-1 CRAMPS NMR

H-1 CRAMPS NMR techniques are used to study the phase structure of complexed and decomplexed blends of poly[(N-ethylcarbazol-3-yl)methyl methacrylate] [poly(NECMM)] and poly{2-[(3,5-dinitrobenzoyl)oxy]ethyl methacrylate} [poly(DNBEM)] (mole ratio = 1:1). H-1 CRAMPS spectra of two-layer, decomplexed, and complexed samples show a line-shape change in the aromatic region which reflects the electron density change due to charge-transfer interaction. H-1 spin diffusion experiments are employed to estimate the domain sizes of the complexed sample and the domain sizes and interface size of the decomplexed sample. The complexed sample is mixed at the molecular level. The domain sizes and interface size of the decomplexed sample are too large for these experiments. It is estimated that the decomplexed sample has about 30% of the volume fraction in the interface and that in it poly(NECMM) and poly(DNBEM) are mixed at a molecular level.