| Abstract: | Abstract The solid state NMR technique was employed to investigated the homogeneity level of the melting mixtures of polypropylene (PP) and glycerol ester of hydrogenated rosin (ester gum) prepared at different proportions and under selected conditions. The results were discussed in terms of the blend domains with distinct mobilities at kilohertz range. Up to 30% of rosin the blends revealed a slight increase in the proton spin lattice relaxation time in the rotating frame (T1Hp) values caused by increasing the mobility process of PP domains. The presence of one phase at the time scale of that relaxation parameter suggests sample homogeneity. The T1Hp value for blend with 50% of rosin indicated incompatibility. |
