адгезія

Описано методологію математичного моделювання адгезійного шару на межі «метал–діелектрик». Для перехідної області визначено ємність, ефективну товщину подвійного електричного шару, роботу адгезії, енергію адгезійних зв’язків.

Methodology of mathematical modelling of adhesion layer on a interface  "metal– dielectric" is described. For a transitional area a capacity, effective thickness of double electric layer, work of adhesion and energy of adhesive bonds is determine.

The chemical modification of tar with formaldehyde as 37% aqueous solutionhas been studied in the presence of the catalysts. Hydrochloric acid, sulfuric acid, sodium hydroxide and acid tar were used as the catalysts. The effect of the catalyst nature and amount, as well as temperature, process time and initial components ratio on the softening point, penetration, brittle point and adhesion to crushed stone has been determined. The structure of the modified tars was confirmed by IR spectroscopy. The structural-group composition was determined.

The article is presenting a modification of bituminous binder with ecological epoxidized rapeseed oil (BERO) in the presence of the initiator (hardener). Adipic acid (AA), maleic anhydride (MA) and polyethylene polyamine (PEPA) were used as the initiators. The effect of modification temperature and, as well as initiator nature, on the bitumen properties was determined. Bitumen modified with BERO was evaluated by the following indicators: softening temperature, penetration, ductility, and adhesion to the glass.

Slow-breaking monophase cationic bitumen emulsions have been produced on the basis of bitumen modified with phenol-cresol-formaldehyde resin (PhCR-F). Bitumen emulsions were used as a binder for thin-layer coatings with slurry surfacing mixes (SSM). Physical and technical parameters of modified and unmodified emulsions were determined and analyzed. The optimal compositions of SSM were selected according to the breaking criterion. The values of SSM wet track abrasion were determined.

 The properties of the filled polymer compositions largely depend on the nature and surface properties of the fillers- basalt fiber. The possibility of modifying the surface of the basalt fiber with commercial polyhexamethyleneguanidinehydrochloride and non-commercial polydiethyleneaminoguanidine - appretes, were demonstrated for the first time.