Evolution of Particle Morphology During Polymerisation of High Impact Polypropylene # #An earlier version of this paper was presented at ECOREP II, 2nd European Conference on Reaction Engineering of Polyolefins, Lyon, France, July 1–4, 2002.

The particle morphology of impact polypropylene was examined experimentally in order to understand how the rubber phase produced in the second step of! the polymerisation is distributed inside the growing polymer particles, and how the quantity of rubber produced influences the overall morphology of the final product. It was found that the rubber can pool on the surface of the growing particles, but that this pooling is not uniform. In addition, it was observed that the rubber phase does not [ABSTRACT FROM AUTHOR]