Abstract
Cure agents including micro-pulverized dicyandiamide, aliphatic amine, imidazole, dyhydrazide, and ureas have been formulated with DGEBA (diglycidyl ether of bisphenol-A) epoxides to provide preimpregnated fiberglass prepregs suitable for the rapid production of structural composites under an aggressive elevated temperature cure schedule (10 min at 110°C). Formulations have been developed utilizing in part Taguchi orthogonal experimental arrays and compared to existing chemistries. Chemical formulation properties including heat of reaction, viscosity, glass transition, process parameter determination, and impact of environmental exposure have been investigated. Formulations developed within this body of work appear to outperform current commercial systems for the production of structural composites rapidly processed at a relatively low temperature.
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Holbery, J.D., Bordia, R.K. Accelerated cure of thermoset fiber composites utilizing latent cure agents. Journal of Materials Science 36, 5301–5308 (2001). https://doi.org/10.1023/A:1012474702397
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DOI: https://doi.org/10.1023/A:1012474702397