NMR study of the effect of electron beam processing on a poly(ether-block-amide)

1H T1 and T1ρ measurements together with FID function fitting were used to investigate the effect of electron beam irradiation on the dynamics of a poly(ether-block-amide). Rigid polyamide and mobile polyether phases are seen in the FID of the control polymer. Irradiation causes a decrease in mobility of the mobile phase. Spin diffusion evident in the T1 and T1ρ shows qualitatively a phase separated morphology on the 2 nm scale and prevents a clear interpretation of the changes caused by irradiation. Only minor differences were seen in the 13C CPMAS NMR spectra of the control and irradiated polymers.