The rheological properties of curing process of epoxy prepreg were measured by Bohlin Rheometer. The variations of storage modulus, loss modulus and viscosity are monitored vs. the cure time and temperature. Viscosity profiles were described by different models. Except the first order viscosity models, new viscosity models based on Boltzmann function were proposed. In the new models, a parameter called critical time was introduced. Critical time is a function of temperature and also meets an Arrhenius law. The activation energy calculated by critical time closes to that obtained by initial viscosity. The kinetic rate constants in the old and new models are comparable at each temperature, and the kinetic activation energies calculated from rate constants in the old and new models are very close. The fitting results show that the proposed new viscosity models are better than the old models for both isothermal and dynamic cure processes.
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ASME 2002 Engineering Technology Conference on Energy
February 4–5, 2002
Houston, Texas, USA
Conference Sponsors:
- Petroleum Institute
ISBN:
0-7918-3591-X
PROCEEDINGS PAPER
Rheological Analysis of Curing Process of Epoxy Prepreg Used as Composite Pipe Joints
Liangfeng Sun,
Liangfeng Sun
Louisiana State University, Baton Rouge, LA
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Arthur M. Sterling,
Arthur M. Sterling
Louisiana State University, Baton Rouge, LA
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Su-Seng Pang,
Su-Seng Pang
Louisiana State University, Baton Rouge, LA
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Michael A. Stubblefield
Michael A. Stubblefield
Southern University, Baton Rouge, LA
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Liangfeng Sun
Louisiana State University, Baton Rouge, LA
Arthur M. Sterling
Louisiana State University, Baton Rouge, LA
Su-Seng Pang
Louisiana State University, Baton Rouge, LA
Michael A. Stubblefield
Southern University, Baton Rouge, LA
Paper No:
ETCE2002/OT-29154, pp. 597-604; 8 pages
Published Online:
January 7, 2009
Citation
Sun, L, Sterling, AM, Pang, S, & Stubblefield, MA. "Rheological Analysis of Curing Process of Epoxy Prepreg Used as Composite Pipe Joints." Proceedings of the ASME 2002 Engineering Technology Conference on Energy. Engineering Technology Conference on Energy, Parts A and B. Houston, Texas, USA. February 4–5, 2002. pp. 597-604. ASME. https://doi.org/10.1115/ETCE2002/OT-29154
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