Calibration of 1H NMR Spin Diffusion Coefficients for Mobile Polymers through Transverse Relaxation Measurements

Solid-state 1 H NMR spin diffusion experiments are useful tools for the elucidation of domain sizes of heterogeneous polymers. For quantitative determination of domain sizes, however, reliable values of the spin diffusion coefficients are required. In this paper, spin diffusion coefficients are calibrated for mobile polymers through the transverse relaxation rate T 2 -1 of 1 H magnetization measured by a Carr−Purcell−Meiboom−Gill sequence. Different regimes were observed for T 2 -1 below and above 1 kHz.