Measurement of in situ Monomer Sorption in Poly(propylene)

An experimental method has been developed to compare the amount of monomer absorbed in freshly produced poly(propylene) with the amount of monomer absorbed in the same material after degassing. It has been found that propylene sorption in freshly produced poly(propylene) is significantly higher than...

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Veröffentlicht in:	Macromolecular rapid communications. 2004-09, Vol.25 (18), p.1638-1642
Hauptverfasser:	Pater, Jochem T. M., Weickert, Günter, Fait, Anna, Mei, Gabriele
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences equilibrium measurements Exact sciences and technology monomers Organic polymers Physicochemistry of polymers poly(propylene) (PP) Polymerization Preparation, kinetics, thermodynamics, mechanism and catalysts
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Beschreibung
Zusammenfassung:	An experimental method has been developed to compare the amount of monomer absorbed in freshly produced poly(propylene) with the amount of monomer absorbed in the same material after degassing. It has been found that propylene sorption in freshly produced poly(propylene) is significantly higher than the sorption in the same but degassed polymer. The difference depends on the degree of drying and is time‐dependent. This fact can be an explanation for reduced activity often observed in the transition from liquid‐ to gas‐phase polymerization. Pressure profile during the pressure‐swing part of the experiment.
ISSN:	1022-1336 1521-3927
DOI:	10.1002/marc.200400198