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“Chain-End-Controlled Isotactic” and “Stereoblock-Isotactic” Polypropylene: Where Is the Difference?

2002; Wiley; Volume: 42; Issue: 4 Linguagem: Inglês

10.1560/bmbv-8r8h-w4ft-fqb8

1869-5868

Vincenzo Busico, Roberta Cipullo, Giovanni Talarico, Valeria Castelli,

Polymer crystallization and properties

This communication describes the microstructure of “stereoblock-isotactic” polypropylene obtained with sterically hindered “oscillating” metallocene catalysts, points out in which respects it differs from that of “chain-end-controlled isotactic” polypropylene, and explains why the two definitions cannot be used as synonymous (as is commonly found in the literature).