modification

Synthesis of peroxy oligomers using 1,2-epoxy-3-tert-butyl peroxypropane

The possibility of peroxy oligomer synthesis has been studied by three methods: telomerization of diepoxy derivatives of ethylene glycol or Bisphenol A using 1,2-epoxy-3-tert-butyl peroxypropane as telogen, modification of phenol-formaldehyde resins by 1,2-epoxy-3-tert-butyl peroxypropane and polycondensation of phenol containing –O–O– bonds with formaldehyde. The peroxy oligomers obtaining conditions have been established and 7 new oligomers with peroxy groups have been synthesized. The structures of synthesized oligomers have been verified by chemical and spectral methods.

Constructional Materials Based on Cross-linked Polypropylene Reinforced by Modified Basalt Fibers

Technology of polymer materials production based on polypropylene reinforced by modified basalt fibers has been obtained. The experimental results of polypropylene modification by benzoyl peroxides and mixture of benzoyl peroxide with methylvinylcyclosiloxane on mechanical properties of composite material have been shown. It has been established that composite materials based on crosslinked polypropylene reinforced by basalt fibers which are dressed by polyepichlorohydrin resins have the increased mechanical and thermo-physical properties.

Chemical Modification of ED-24 Epoxy Resin Peroxy Derivative by C9H4F16O Fluorine-Containing Alcohol-Telomer

The possibility of chemical modification of ED-24 epoxy resin peroxy derivative (PDER) by C9H4F16O fluorine-containing alcohol-telomer (FAT-C9) has been shown using 18-Crown and ZnCl2 catalytic system. The effect of catalyst amount, temperature and process time on the reaction rate has been studied. New peroxy oligomer containing fluorine atoms (FPO) has been synthesized and characterized. The FPO structure has been confirmed by IR-spectroscopy.

Production of Bitumen Modified by Petroleum Resins on the Basis of Tars of Ukrainian Oils

Experimental results concerning main regularities of paraffin tar and petroleum resins joint oxidation are presented. It has been shown that petroleum resin in the amount of 5 mas % as raw material component allows to intensify oxidation and improve operational characteristics of obtained bitumen.

Chemical Modification of Dianic Epoxy Resin by Fluorine-Containing Alcohols

New epoxy resins with fluorine atoms have been synthesized via chemical modification of dianic epoxy resin with fluorine-containing alhocols-telomers C7, C9 and C13, using benzyltriethylammonium chloride and KOH as a catalyst system. Their characteristics have been examined. The structure of synthesized products has been confirmed by IR-spectroscopy. It has been shown that new epoxy resins may be used as active plasticizers for industrial epoxy resin.

Regularities of Films Forming on the Basis of Polyamide-Polyvinylpyrrolidone Mixtures

Modification of polyamide-6 by polyvinylpyrrolidone with molecular mass of 12000±2000 has been carried out using their mixing in formic acid solution followed by solvent evaporation. The possibility of films permolecular structure control, physico-mechnical and thermophysical properties by treatment conditions after their formation has been established.

Modification of Residual Bitumen from Orhovytska Oil by Butonal Polymeric Latexes

Modification of residual bitumen from Orhovytska oil by Butonal polymeric latexes has been studied. Using such modifiers the softening temperature and bitumen elasticity increase and penetration decreases. The commercial paving bitumen may be produced from the residuals using Butonal polymeric latexes.

Modified Phenol-Formaldehyde Resins and their Application in Bitumen-Polymeric Mixtures

Phenol-formaldehyde resins (PhFR) with reactive methacrylate fragments or labile peroxy bonds in the side branches used as a polymeric component of bitumen-polymeric mixtures have been investigated. Taking into account that PhFR with peroxy fragments based on epoxy resin does not described in literature, its synthesis procedure has been developed. The kinetic regularities of the reaction between peroxy derivative of epoxy resin (PDER) and phenol group of PhFR were studied taking the reaction of PDER with phenol as an example.

Modification of Chitosan Films as a Way of their Transport Properties Regulation

Chitosan films obtained from solutions in acetic acid and containing the antibiotics – cephazolin and cephotoxim – have been investigated and the principal possibility of regulating their transport properties as regards the medicinal preparations release has been demonstrated. This regulation can be carried out by films thermal modification consisting in heating of the formed films at the temperature of about 393 K and their treatment with sodium dodecylsulphate solution.