1H NMR signal narrowing of solid polymer by high frequency oscillation

The 1H NMR spectrum of polyethylene thin film on an piezoelectric oscillator plate made of inorganic material was observed, which is oscillated with high frequency by application of AD electric current in the Hz–MHz range. From these experimental results, it is shown that dipolar interactions in solid polyethylene are remarkably reduced by high frequency oscillation and then the signal width of the crystalline component is significantly reduced with an increase in oscillation frequency. This means that the introduction of the high frequency oscillation for solids has large potentiality of obtaining the high resolution NMR spectrum.