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Browsing by Subject "binder"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    An effect of aromatic diluent addition on the selected properties of epoxy resin
    (2005) Hutera, Barbara; Drożyński, Dariusz
    The article describes the studies which have been conducted on the dynamic wetting of quartz grains by EPIDIAN 5 resin and by this resin with an addition of 5 wt. %, 20 wt. % and 30 wt. % of xylene at different temperatures. In the case of the investigated resin, the wetting process dynamics is best described by a logarithmic function: theta = A Int + B0, where: theta is the contact angle after time t, and A and B0 are constants characteristic of this process at a given temperature. It has been proved that with 5 wt. % addition of xylene both constants assume a value different than zero. With addition of 20 wt. % and 30 wt. % of xylene, the State of equilibrium is reached almost immediately, and it is expressed by a zero value of constant A. The infrared spectroscopy did not reveal the presence of any chemical reactions between the EPIDIAN 5 resin and xylene, thus confirming that the chemical structure of xylene molecule affects the type of interaction and proves the non-active behaviour of xylene as a diluent. The importance of the studies for foundry sand practice has been stressed.
  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Determination of binder content in traditional sandmixes by microwave method
    (AGH University of Science and Technology Press, 2017) Nowak, Daniel
    This paper presents preliminary research on the possibility of determining the binder content in traditional sandmixes by the microwave method. The research included examinations of three kinds of bentonite. The presented measurements were carried-out with the use of a special stand - the so-called slot line. The concentration of the binder in molding sand was determined on the grounds of measurements of a parameter, i.e., absorbed power or output power of the electromagnetic wave. One of the main advantages of the suggested new method is the short time of the measurement.