Flame Retardant Epoxy Derived from Tannic Acid as Biobased Hardener

Title
Flame Retardant Epoxy Derived from Tannic Acid as Biobased Hardener
Authors
정용채문병준조재현김영오이병완하유미조예린Hyeonuk Yeo
Issue Date
2019-02
Publisher
ACS sustainable chemistry & engineering
Citation
VOL 7, NO 4-3865
Abstract
Flame retardant epoxy is closely related to the safety of a human’s life against the surrounding fire threat. Flame retardant properties can be obtained by supplementing with additives, such as phosphorus compounds and nanomaterials, or synthesizing flame retardant monomers. The principle of improving flame retardancy is based on the capture of oxygen radicals and the formation of a char layer, which blocks flammable gases. This paper focuses on a flame retardant epoxy resin using naturally occurring tannic acid (TA) as a hardener, which is both an oxygen-radical quencher and a charring agent. TA is reacted with the commercially available diglycidyl ether of bisphenol A (DGEBA). The reaction between the epoxy ring of the DGEBA and multiple functional groups in TA is empirically demonstrated using dynamic scanning calorimetry (DSC) and Brillouin spectra. The most effective flameretardant TA-DGEBA (TD) thermoset had an limiting oxygen index (LOI) value 46% higher than the control sample. This result suggests that TA-based epoxy resins could be promising flame-retardant polymers.
URI
http://pubs.kist.re.kr/handle/201004/69054
ISSN
2168-0485
Appears in Collections:
KIST Publication > Article
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