Category Archives: Year 2012 Issue 4

The impact of external factors on the degradation process of refinish top coatings

The impact of external factors on the degradation process of refinish top coatings KURCOK M., LACHOWSKI A., ŚLIWA A. Please cite as: CHEMIK 2012, 66, 4, 315-320 This paper presents the studies on the impact of factors, to which the top coatings of the motor vehicle body are exposed, on the degradation of such coatings. Two types of the refinish acrylic top coatings were selected for the experimental purpose ? twolayer and three-layer ones. These coatings were exposed to the UV radiation, acid rain...
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Impact of selected chemical substances on the degradation of the polyolefin materials

Impact of selected chemical substances on the degradation of the polyolefin materials CZOP M., BIEGAŃSKA J. Please cite as: CHEMIK 2012, 66, 4, 307-314 An increased production and consumption of various types of plastics leads to the increase of the wastes. The majority of wastes are formed by wastes from polyolefin group. Due to lack of susceptibility to hydrolysis or decomposition, utilization of the plastic wastes is a very complicated problem. Increasing amount of plastic wastes forces a search for the new, ecological and...
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Fire-safe polyurethanes modified with new antipyrene

Fire-safe polyurethanes modified with new antipyrene PACIOREK-SADOWSKA J., CZUPRYŃSKI B., LISZOWSKA J. Please cite as: CHEMIK 2012, 66, 4, 297-306 Results of multi-directional investigations on flammability conducted in the framework of studies on new antipyrenes for production of rigid polyurethane-polyisocyanurate (PURPIR) foams were presented in the paper. During determining a new foam recipe, special attention was paid to the possibility of reducing flammability of rigid foams by application of new halogen-free flame retardants. The new boronitrogen compound allowed us to obtain fire-safe PUR-PIR foams characterized by higher...
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Organic semiconductors ? materials of the future?

Organic semiconductors ? materials of the future? ŚWIST A., SOŁODUCHO J. Please cite as: CHEMIK 2012, 66, 4, 289-296 The discovery of electrical conductivity and interesting optical properties (luminescence) of macromolecules with conjugated ?-bond system has revolutionized the electronics. Extensive application of organic semiconductors (organic photovoltaic cells, biosensors, organic light emitting diodes, printed circuits) caused that they being named ?the materials of the future?. In the article was carried out the discussion whether actually conducting macromolecular compounds deserve such a term and will...
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Methods of synthesis of oligoetherols suitable for obtaining of some polymers with higher thermal stability

LUBCZAK J. Please cite as: CHEMIK 2012, 66, 4, 279-288 Methods of preparation of the oligoetherols containing azacyclic rings are presented. A procedure of hydoxyalkylation of melamine, isocyanuric, uric and barbituric acids with oxiranes, formaldehyde and alkylene carbonates are described. The heterocyclic rings provide the polymeric materials obtained from them with enhanced thermal stability like polyurethanes, polyesters and polyacrylates. The procedures, catalysts, and solvents are described and main directions and possibilities of applications of the compounds are discussed. Keywords: azacyclic compounds, oxiranes, formaldehyde, alkylene carbonates, hydroxyalkylation Read more: Read more