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http://dx.doi.org/10.7234/composres.2022.35.6.412

Styrene-free Synthesis of Flame-retardant Vinyl Ester Resin Films for Hot-melt Prepreg Process  

Jiseon, Kang (Department of Chemical Engineering and Materials Science, Sangmyung University)
Minji, Kim (Department of Chemical Engineering and Materials Science, Sangmyung University)
Mongyoung, Huh (Korea Carbon Industry Promotion Agency)
Seok Il, Yun (Department of Chemical Engineering and Materials Science, Sangmyung University)
Publication Information
Composites Research / v.35, no.6, 2022 , pp. 412-418 More about this Journal
Abstract
Flame-retardant vinyl ester (VE) resin films were developed from the mixtures of brominated and non-brominated epoxy resins via esterification with methacrylic acid without reactive diluents. The films were used to fabricate carbon fiber (CF) prepregs via a hot melt impregnation process. The viscosity of VE resins suitable for film production was optimized by mixing low-viscosity bisphenol-A and high-viscosity brominated bisphenol-A epoxy precursors. Increasing the bromine content of the cured VE resin further increased the limited oxygen index (LOI) (39%), storage modulus (2.4 GPa) at 25℃ and residual carbonization (16.1%) values compared to non-brominated VE. Manual layup of as-prepared VE prepregs with subsequent curing led to the successful fabrication of CF-reinforced composites with high tensile and flexural strength. The results from the study hold high promise for a styrene-free, environmentally friendly VE composite process in the future.
Keywords
Flame-retardant; Brominated vinyl ester; Carbon fiber prepreg; Styrene-free synthesis;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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