Abstract
This publication describes research on the course of the process of
cross-linking new BioCo polymer binders - in the form of water-based
polymer compositions of poly(acrylic acid) or poly(sodium
acrylate)/modified polysaccharide - using selected physical and chemical
factors. It has been shown that the type of cross-linking factor used
influences the strength parameters of the moulding sand. The crosslinking
factors selected during basic research make it possible to obtain sand
strengths similar to those of samples of sands bonded with commercial
binders. Microwave radiation turned out to be the most effective
cross-linking factor in a binder-matrix system. It was proven that
adsorption in the microwave radiation field leads to the formation of
polymer lattices with hydrogen bonds which play a major role in
maintaining the formed cross-linked structures in the binder-matrix
system. As a result, the process improves the strength parameters of the
sand, whereas the hardening process in a microwave field significantly
shortens the setting time.
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