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Crystallinity and isotactic index of polypropylene samples prepared by VOCI3 and aluminum alkyls

✍ Scribed by M. V. Pandya; G. Maryam; M. R. Desai; K. Suresh Kumar

Publisher: John Wiley and Sons
Year: 1992
Tongue: English
Weight: 331 KB
Volume: 45
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1992.070450413

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✦ Synopsis

The X-ray crystallinity and the isotactic index [II( % ) ] values were measured for polypropylene (PP) samples prepared by V0Cl3 and various aluminum alkyls. The reaction parameters, such as aging time, temperature, reaction medium, and additives, have some effect on the crystallinity of the samples. Among the three systems studied, a combination of V0Cl3 + Et2A1C1 was found to give PP with higher crystallinity and 11. In general, the tacticity of the samples prepared were much lower than the samples prepared with a-, p-, y-TiCls as the catalyst.

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