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Polymers and Polymer Composites

LINEAR TEMPERATURE PROGRAMMING RHEOMETERS FOR THE CURE OF RUBBERS. EFFECT OF THE VARIOUS PARAMETERS

January 1, 2004 By: Rosca I D; Granger R; Vergnaud J M Research article

Title: LINEAR TEMPERATURE PROGRAMMING RHEOMETERS FOR THE CURE OF RUBBERS. EFFECT OF THE VARIOUS PARAMETERS
Page Range: p.87-98
Author(s): Rosca I D; Granger R; Vergnaud J M
File size: 123K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 12
Issue No: No. 1

Abstract
Advantages are discussed of the use of rheometers in scanning mode in order to determine the kinetic parameters of the cure of rubbers. In this method, the heating rate is crucial. The rubber used in this study was EPDM, and the state of cure versus temperature curves obtained in scanning mode were calculated using a numerical model that takes into account the heat transfer by conduction through the rubber, the coefficient of heat transfer at the die-rubber interface, and the kinetics of the heat generated by the cure reaction. The kinetic parameters were determined mathematically from these state-of-cure versus temperature curves. The kinetic parameters calculated in these ways were found to be similar to those introduced by obtaining the state-of-cure versus temperatures curves using the numerical model. Whatever the heating rate, ranging from 2 to 10 K/min, and whatever the coefficient of heat transfer at the die-rubber interface which expresses the quality of the contact, satisfactory use of the moving die rheometer was demonstrated in scanning mode in order to determine the kinetics of the cure of rubbers, even when the enthalpy of cure is high. 22 refs.

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