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Free radical suspension polymerization kinetics of styrene up to high conversion
Author(s) -
Tefera Nurelegne,
Weickert Günter,
Bloodworth Robert,
Schweer Johannes
Publication year - 1994
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1994.021950906
Subject(s) - kinetics , polymer chemistry , styrene , radical polymerization , suspension polymerization , polymerization , chemistry , suspension (topology) , chemical engineering , materials science , photochemistry , copolymer , organic chemistry , polymer , physics , mathematics , homotopy , pure mathematics , engineering , quantum mechanics
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 k t with conversion. One explanation for this is that k t is chain length dependent. Evidence for this necessity was derived by considering all kinetic parameters, except the termination rate coefficient, as reliable absolute values.