These compounds or phytochemical constituents incorporate terpenes, flavonoid, bioflavonoid, benzophenones, xanthenes and also a few metabolites, for example, tannins, saponins,
cyanates, oxalate and anthrax-quinones [6].
Therefore a distinction between free, WAD and total cyanide forms (other compounds such as
cyanates or thiocyanates are also present) in tailings water is useful for legal regulatory purposes [8].
H., Sushada, C., and Swapan, C., 2008, "A Versatile Series of Nickel(II) Complexes derived from Tetradentate Imine/Pyridyl Ligands and Various Pseudohalides: Azides and
Cyanates Compared," Inorganic Chemistry, 47, 10, pp 4109-4117.
All substances were classified in respective chemical groups as: Aliphatic hydrocarbons; aromatic hydrocarbons; isothio
cyanates; ketones; nitrosamines; thiazoles; aldehydes; amines; and sulfur compounds.
Aromatic
cyanates are low viscosity resins that can crosslink to form polycyanurate networks by forming thermally stable cyclic triazine rings.
Among these materials, thermosetting epoxy resins, polyimides, and
cyanate esters were extensively investigated together with fiber-reinforced composites [1].
Cyanate ester (CE) resins have received considerable attention in the past few years because of their importance as thermosetting resins for use in the aerospace, electronics, and adhesive industries [1-6].
A new
cyanate ester resin system, EX-1515, from Bryte Technologies, Milpitas, Calif., is said to be unique in that it can achieve an extremely high level of conversion after a 250 F cure.
Structural characterizations reveal that the plasma polymerization of three
cyanate ester monomers proceeded mainly via the opening of [pi]-bonds of the
cyanate ester functional groups and transforming them to a large [pi]-conjugated structure, which is noticeably different from the conventional thermal or catalytic cyclo-trimerization reaction of
cyanate ester monomers.