Abstract: Polypropylene(PP)/rare earth strontium aluminate (RESA) composites were prepared by melt blending. The effect of the content of RESA on the crystallization behavior, mechanical and optical properties was studied. It showed that the crystal structure of PP did not change with the inclusion of RESA. Due to the effect of heterogeneous nucleation, the crystallinity of the composites increased, the spherulites became smaller and more uniform with increasing RESA loading. The tensile strength and elongation at break increased first and then decreased. The initial light intensity increased with increasing content of RESA. The light intensity curve showed a typical exponential attenuation.

Key words: polypropylene, rare earth strontium aluminate, luminescent materials