VARIATION OF GLASS TRANSITION AS A FUNCTION OF THE DEGREE OF CURE IN AN EPOXY-NOVOLAC SYSTEM.

Arturo Hale, Christopher W. Macosko, Harvey E. Bair

Research output: Contribution to journalArticlepeer-review

Abstract

A study of the kinetic characterization using a differential scanning calorimeter (DSC) is presented. The system under study reacts via cross linking free radical polymerization with inhibition. A phenomenological equation for the rate of reaction which includes vitrification effects is presented. The equation showed reasonable agreement for isothermal and dynamic data in the range of 0. 1 X//m//a//x less than X less than 0. 9 X//m//a//x. The maximum conversion obtained under isothermal conditions correlates well with the equation of Di Benedetto. The enthalpy of reaction was found to be independent of temperature for the isothermal experiments. The value for the enthalpy of reaction evaluated from the dynamic data was similar to the isothermal one. The values obtained for the kinetic parameters from isothermal and dynamic data were relatively close.

Original languageEnglish (US)
Pages (from-to)1110-1115
Number of pages6
JournalAnnual Technical Conference - Society of Plastics Engineers
StatePublished - Dec 1 1987

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