Macromolecular Theory and Simulations · 2005 · 17 citations · 12 references
Natural SciencesChemical EngineeringChemistryChemical KineticsPolymer ChemistryPolymer EngineeringFree-radical PolymerizationPolymer Physical ChemistryPolymer ProcessingPolymerization ChemistryPolymerization KineticsPolymerization ProcessesCopolymerizationCopolymerization BehaviorCopolymerization KineticsFree-radical Polymerization KineticsKinetic Modeling Of PolymerizationPolymer Composition EffectsPropagation KineticsTemperature-dependent Reaction Rate
Abstract Summary: Methacrylate copolymers produced under higher temperature starved‐feed conditions are affected by depropagation, and some binary systems also experience a penultimate effect. In this work a generalized set of equations has been developed to describe the combined effect of depropagation and penultimate copolymerization kinetics on instantaneous copolymer composition and average copolymerization rate coefficients. Limiting cases applicable to the methacrylate/styrene system are examined. When combined with depropagation, penultimate kinetics not only decrease the effective propagation rate coefficient but also deviate from terminal model predictions of polymer composition. Copolymerization chain growth with penultimate kinetics and depropagation. magnified image Copolymerization chain growth with penultimate kinetics and depropagation.
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