SYMPOSIA PAPER Published: 01 January 1991

Compositional Effects of Fiber Reinforced Composites on the Coefficient of Thermal Expansion


A McLean-Anderson experimental design for mixtures was used to design formulations for an automotive grade sheet molding compound (SMC). With the use of the Scheffe special cubic model, a predictive equation has been calculated to predict the coefficient of linear thermal expansion (CLTE) for an automotive grade SMC. The experimentally designed formulations included four control factors: resin, initiator, filler, and glass. The range levels were chosen based on the criteria for an automotive grade SMC. CLTE predicted values versus observed values have residuals ranging from 0.03 to 14.9% deviation based on four test formulations. Qualitative predictions were determined based on experimental work from various types of resin and glass.

Author Information

Adams, RD
Premix, Inc., Research and Development, North Kingsville, OH
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Developed by Committee: E37
Pages: 150–160
DOI: 10.1520/STP23599S
ISBN-EB: 978-0-8031-5178-9
ISBN-13: 978-0-8031-1434-0