Abstract
1H spin-spin relaxation time (T2) and 1H spin-diffusion of poly(4-vinyl phenol)/poly(methyl acrylate) (PVPh/PMA) blend are measured indirectly by observing well-resolved 13C CP/MAS resonance. The results indicate that at 310 K the molecular motion of the whole chain of PMA in the blends is hindered by mixing with PVPh. At 361 K, the blending hinders only the main-chain motion of PMA; the CH3 group in the side-chain still undergoes more or less free rotation. The spin-diffusion from the CH3 protons of PMA to the protons of PVPh occurs in the blend. It is concluded that PVPh and PMA are intimately mixed in the blend.
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