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Propene-co-butene random copolymers synthesized with superactive Ziegler-Natta catalyst

โœ Scribed by G. Collina; L. Noristi; C.A. Stewart

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
385 KB
Volume
99
Category
Article
ISSN
1381-1169

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โœฆ Synopsis

Temperature rising elution fractionation (TREF) was carried out on propene-co-butene random copolymers synthesized with heterogeneous Ti-based Ziegler-Natta catalysts. "C-NMR and DSC measurements were carried out on the fractions. It was found that fractionation occurred on the basis of copolymer crystallizability, which is controlled by both stereoregularity and composition. This work also pointed out that such copolymers are blends of nearly Bernoullian macromolecules having different composition. Finally, a relationship between stereospecificity and comonomer reactivity appeared from the experimental data.

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