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http://dx.doi.org/10.7234/composres.2018.31.1.008

Synergistic Effect in Mechanical Properties of Sheet Molding Compound via Simultaneous Incorporation of Glass Fiber and Glass Bubble Fillers  

Noh, Ye Ji (Automotive Composite Division, Dongsung Corporation)
Lee, Yong Cheol (SECO R&D Center, ECOPLASTIC)
Hwang, Taewon (Automotive Composite Division, Dongsung Corporation)
Publication Information
Composites Research / v.31, no.1, 2018 , pp. 8-11 More about this Journal
Abstract
Sheet molding compound (SMC) is one of the most economical fiber reinforced composite fabrication processing for automotive applications. In this study, we studied the optimum formulation for the production of SMC which shows low specific gravity without lowering the mechanical properties by using glass bubble (GB) which is a low specific gravity filler and glass fiber (GF) as a reinforcing material. The tensile strength increased with the increase of the GF in the SMC, and the specific gravity decreased with the increase of the GB. The synergistic effect of improving the mechanical properties as the specific gravity is lowered is found in the optimum formulation. The synergy effect was confirmed by the internal structure analysis that the dispersion effect of the crack propagation of the GB and the improvement of the binding force between the fiber and the matrix due to the incorporation of the GB.
Keywords
Sheet molding compound; Composite materials; Glass bubble; Mechanical properties;
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