Helen Lavrenyuk and Borys Mykhalichko
Lviv State University of Life Safety, Ukraine
Posters & Accepted Abstracts: J Material Sci Eng
Among great number of polyamines, the diethylenetriamine (deta) is widely used as a curing agent in the production of epoxy resins. The polymeric materials on the basis of epoxy resins, viz. thermoset polymers, are one of the most important polymer systems used today in the industry, ranging from simple two-part adhesives to high-tech applications On the other hand, deta is a potentially tridentate ligand which can form chelate bonds with transition metal atoms, in particular, with copper(II). This feature of deta behavior has allowed us to solve a problem related to the elaboration of new polymeric materials with the decreased combustibility using the following approach: crystaline copper vitriol (flame retardant) was added to epoxy-amine resin. In this process the chemical interaction of deta (a curing agent of epoxy resins) with noncombustible copper vitriol (copper(II) sulfate pentahydrate) in many respects predetermines the properties of [Cu(deta)H2O]SO4.H2O as flame retardant-hardener. The total energy of three Cu�N bonds which belong to the square-pyramidal coordination core equals 237.39 kJ�mol�1. These strong coordination bonds that arise between metal atoms of incombustible CuSO4 and N atoms of the amine hardener � deta as well as formation of stable chelate complex in solid state are responsible for the flammability suppression of the modified epoxy-amine composite material. Appositely, works directed towards the use of chelate complexes with participation of other transition metal salts in the production of self-extinguishing epoxy-amine composites are under way.
Email: olaw@ukr.net
Journal of Material Sciences & Engineering received 3677 citations as per Google Scholar report
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