Prediction of state of cure throughout rubber components

Gregory I. H., . and Muhr A. H., . and Imizan A. B., . Prediction of state of cure throughout rubber components. pp. 1-22. ISSN 1511-1768

During moulding of many rubber components temperature gradients persist for a significant fraction of the cure time. Thus the cure conditions are non-isothermal and also non-uniform throughout the component. In consequence the physical properties of standard testpieces cured isothermally (e.g. 2 mm thick sheet) may be unrepresentative of those of the rubber in the component. The theoretical framework for calculating isothermal cures representative of a particular temperature history is reviewed. The theory is implemented for specific cases by solving the transient thermal problem using finite element analysis (FEA) together with user defined variables representing the equivalent cure time and the representative temperature of an equivalent isothermal cure. The predictions are compared to experimental results. The overall agreement is good but the limitations of both the theory and the idealised boundary conditions for the calculations are discussed. Implications for moulding procedures and mould design are also given.

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Abstract

During moulding of many rubber components temperature gradients persist for a significant fraction of the cure time. Thus the cure conditions are non-isothermal and also non-uniform throughout the component. In consequence the physical properties of standard testpieces cured isothermally (e.g. 2 mm thick sheet) may be unrepresentative of those of the rubber in the component. The theoretical framework for calculating isothermal cures representative of a particular temperature history is reviewed. The theory is implemented for specific cases by solving the transient thermal problem using finite element analysis (FEA) together with user defined variables representing the equivalent cure time and the representative temperature of an equivalent isothermal cure. The predictions are compared to experimental results. The overall agreement is good but the limitations of both the theory and the idealised boundary conditions for the calculations are discussed. Implications for moulding procedures and mould design are also given.

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Item Type:	Article
AGROVOC Term:	Rubber
AGROVOC Term:	Physical properties
AGROVOC Term:	Heat transfer
AGROVOC Term:	Prediction
AGROVOC Term:	Moulding
AGROVOC Term:	Vulcanization
AGROVOC Term:	Thickness
AGROVOC Term:	Temperature
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23286

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