KINETICS OF CROSSLINKING FREE RADICAL POLYMERIZATION WITH DIFFUSION-LIMITED PROPAGATION.

Gibson L. Batch, Christopher W. Macosko

Research output: Contribution to journalConference articlepeer-review

11 Scopus citations

Abstract

The purpose of this work is to develop and evaluate a mechanistic kinetic model for crosslinking free radical systems. The rate of cure is measured with differential scanning calorimetry (DSC). The important features of the kinetic model are: Generality for systems with several initiators. Typical pultrusion resins, for example, have three initiators. Determination of the degree of initiator consumption during reaction. The high temperatures obtained in thick section molding may deplete the initiator. A dual mechanistic propagation model. The rate of propagation is selected from two independent expressions for reaction-limited and diffusion-limited propagation. Non-constant ratio of inhibition and propagation rate constants, k//z/k//p with temperature. The activation energies of inhibition and propagation, E//z and E//p, are not assumed to be equal.

Original languageEnglish (US)
Pages (from-to)974-976
Number of pages3
JournalAnnual Technical Conference - Society of Plastics Engineers
StatePublished - Dec 1 1987

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