Thermal Analysis of Polypropylene Reactor Blends using Successive Self-Nucleation and Annealing (SSA) Technique

Hybrid catalysts composed of two types of metallocene catalysts including rac-Me2Si(2-Me-4-Ph In)2ZrCl2 (I) and oscillating (2-Ph In)2ZrCl2 (II) are used to synthesize Polypropylene (PP) reactor blends and the final products are fractionated in boiling heptane and hexane. SSA treatment on hexane-insoluble-heptane-soluble parts of the reactor blends shows that in the binary catalytic system, multiplicity of the endotherm peak increases which is indicative of the presence of various lamellar thicknesses in the sample used