Thermal Stability of Peroxyalkynes

The thermal stability of mono- and disubstituted peroxyalkynes was compared. The reaction order and the apparent activation energy for the first step of decomposition of the peroxides were determined. The strength of the O-O bond in 3-tert-alkyl(cycloalkyl, aralkyl)peroxy-3-methyl-1-butynes and 2-tert-alkylperoxy-2-methyl-2-alkynes was estimated.     

Thermal Stability of Mono- and Polycyclic Peroxyalcohols and Their Derivatives by Thermal Analysis

A comparative study of the thermal stability of 33 mono- and polycyclic peroxyalcohols, as well as ethers and esters derived from them was performed by thermal analysis. Reaction orders and apparent rate constants of the first stage of peroxide decomposition were determined from the DTA curves. Semiempirical quantum-chemical calculations of the strength of the O-O bond in peroxycycloalkanols and peroxyalcohols of the adamantane series and their derived esters were performed.     

Comparison of Fibrous Carboxylic Ion Exchangers in Water Treatment to Remove Heavy Metal Ions

Treatment of drinking water to remove heavy metal ions Pb^{2 +}, Cu^{2 +}, Cd^{2 +}, Co^{2 +}, Ni^{2 +}, and Zn^{2 +} with commercial fibrous carboxylic ion exchangers FIBAN Kh-1, K-3, K-4, and K-5 was studied. Features of metal ion sorption from two-component solutions were determined. A comparative evaluation of the sorption selectivity of FIBAN fibrous ion exchangers with respect to heavy metal ions was made.