modification

The reaction of chemical modification of ED-20 epoxy resin with isopropylbenzene hydroperoxide has been studied. The process duration effect on the reaction between resin and hydroperoxide has been determined. The possibility to use the synthesized product as a component in the process of epoxy-oligoesteric compositions crosslinking with application of hardeners various by their nature has been studied.

The modification action of polyvinylpyrolidone (PVP) on morphological peculiarities of magnesium hydrosilicate powder has been investigated. PVP modification mechanism has been studied depending on its introduction method to the system. The most effective modification method is observed during joint precipitation of the system liquid components and PVP.

Poly(vinyl chloride) (PVC) has been modified by dissolution of polystyrene modifier in diesterphthalate plasticizer, followed by dispersive mixing with PVC. The effects of the kind of modifier and plasticizer used on the wetting of PVC by the plasticizer have been evaluated. The degree of plasticizer migration out of the material and the effects of the migration on mechanical and thermophysical properties of modified materials have been determined.

Using IR-and NMR-spectroscopy (1H and 13C) the structure of functional oligomers based on novolac phenol-formaldehyde and polyglycidyl phenol-formaldehyde oligomers has been characterized. The structure of modified phenol-formaldehyde oligomers has been confirmed by the presence of absorption bands and proton shifts corresponding to furan ring, methacrylic fragment, peroxy, hydroxyl, and phenol groups.

The effect of the kind, concentration and introduction method of polymeric modifiers (polyvinyl alcohol and polyvinylpyrrolidone), as well as the kind of metal chloride on the physico-chemical regularities of the obtaining process of modified metal-containing polymer-silicate materials, their morphology and properties has been examined. Using instrumental methods of investigations it was established that obtaining of metal-containing polymer-silicate materials was accompanied by intermolecular interactions between active silicate groups and functional groups of a polymeric modifier.

Pyrolysis mass-spectrometry (PMS) has been employed to investigate the process of thermal destruction of the secondary polyethylene (SPE), which was modified using hexamethylenetetramine (HMTA).