In recent years, there has been substantial development of high-performance epoxy resins which offer improvements in both processing and physical properties for various composites. In this study, we synthesized some kinds of dimeric naphthols and their epoxies derivatives, and evaluated their cured-resin properties.
Two kinds of naphthols, 2,7-dihydroxynaphthalene (2,7-DHN) and 2-hydroxy naphthalene (2-HN) were reacted with formaldehyde to produce dimeric naphthols. By changing the ratio of these raw materials, we could control the functionalities of the dimeric naphthols. The epoxy resins derivatives were prepared by the reaction of the corresponding dimeric naphthol with epichlorohydrin.
We reported the behavior of the cured with diaminodiphenyl sulfone (4,4’-DDS). In our evaluation, two functional dimeric naphthol epoxy has excellent high modulus, high Tg with low water absorption. When this epoxy resin was combined with LER (liquid Bisphenol-A epoxy resin), it showed good mechanical properties suitable for composite application.
Composite applications and examples include creation and fabrication of pre-impregnated fabrics and tapes for aerospace structures, infusion resins for multiple applications and adhesive development efforts.
- Explore material options for higher Tg resistant composites, electronics and formulate new advanced material systems
- Be able to offer employer new options for material development
Why Is It Important?
Higher Tg/temperature resistance is always a goal for advanced composites.