Modificação de superficie da borracha natural por descarga corona

TL;DRAbstract

Studies of the superficial modifications of polymers, caused by corona discharges, are developed with the objective to change the hydrophobic properties presented by these materials, improving their superficial properties without changing their mechanical properties.In the present study, superficial modifications were carried out in the natural rubber, for corona treatment from needles-plane electrode system configuration with power of 5 kV, aiming, on a second moment, the facilitation of the incorporation of fillers with hydrophilic characteristic into the natural rubber.A factorial planning 2 2 was used on the analysis of the results obtained by contact angle measures, taking as an objective the determination of the best time and height for the reduction of the contact angle measured in the polymer surface regarding the distilled water.Complementary techniques were used, like the FTIR/ATR, to determine the chemical-physic alterations taken place in the rubber surface, as well, therma

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