RHEOLOGICAL PROPERTIES OF EPOXY COMPOSITIONS WITH CNTs OBTAINED FROM SOLID EPOXY OLIGOMER

摘要

The dispersion of multiwalled carbon nanotubes (CNTs) in the solid type epoxy oligomer (EO) was carried out in two ways: by master batch dilution technique and by direct mixing using a twin-screw extruder. An analysis of the rheological data shows that the introduction of the CNTs into the epoxy oligomer leads to a marked increase in the viscosity and in the appearance of the yield point. Of the used methods of dispersion of the CNT's aggregates the most efficient one is the master batch technique. The electrostatic spraying of the epoxy composition on the carbon and glass fabric, followed by calendering and pressing, allows production of nanomodified carbon fiber reinforced plastic (CFRP) and glass fiber reinforced plastic (GFRP). The mechanical properties of the obtained CNT-Epoxy composite materials, such as bending strength, shear storage and loss moduli are discussed.