A triple resonance fluorine-19, proton, carbon-13 cross polarization magic angle spinning nuclear magnetic resonance investigation of the miscibility in polymethyl methacrylate/polyvinylidene fluoride blends.
The miscibility of blends of Me acrylate-Me methacrylate copolymer (I) with poly(vinylidene fluoride) (II) was studied using the title NMR method. Two techniques were introduced which gave information on miscibility on the mol. level. By transferring magnetization from F to H and subsequently from H to C, spectra were obtained in which all C resonances of I were present, proving the spatial proximity of I and II chains. Proton spin diffusion was studied to est. the sizes of the domains in which I and II were intimately mixed. Also, the fraction of I and II that was not intimately mixed was extd. from these expts. A model was proposed to explain the exptl. results, and from which the domain sizes were calcd.
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