Free radical suspension polymerization kinetics of styrene up to high conversion

Styrene was polymerized using different amounts of azoisobutyronitrile as initiator at temperatures of 70°C, 75°C and 80°C in suspension. The course of reaction up to almost complete conversion was modeled within a classical kinetic framework. Optimal simultaneous descriptions of both conversion and...

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Veröffentlicht in:	Macromolecular chemistry and physics 1994-09, Vol.195 (9), p.3067-3085
Hauptverfasser:	Tefera, Nurelegne, Weickert, Günter, Bloodworth, Robert, Schweer, Johannes
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Exact sciences and technology Organic polymers Physicochemistry of polymers Polymerization Preparation, kinetics, thermodynamics, mechanism and catalysts
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Styrene was polymerized using different amounts of azoisobutyronitrile as initiator at temperatures of 70°C, 75°C and 80°C in suspension. The course of reaction up to almost complete conversion was modeled within a classical kinetic framework. Optimal simultaneous descriptions of both conversion and average degree of polymerization data were possible using two sets of values for the variation of the overall termination rate coefficient kt with conversion. One explanation for this is that kt is chain length dependent. Evidence for this necessity was derived by considering all kinetic parameters, except the termination rate coefficient, as reliable absolute values.
ISSN:	1022-1352 1521-3935
DOI:	10.1002/macp.1994.021950906