Browsing by Subject "structural studies"
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Item type:Article, Access status: Open Access , FTIR method in studies of the resol-type phenol resin structure in the air atmosphere over certain time intervals(2015) Bobrowski, Artur; Grabowska, BeataThis paper presents the results of structural-type studies of resol phenolic resin used for the preparation of molding and core sands exposed to air. The FTIR study was carried out using a transmittance technique. Recorded changes in the IR spectra of resin can indicate a progressive polycondensation process, the consequences of which being changes in the aromatic rings of methylene bridges (among others).Item type:Article, Access status: Open Access , Structural construction of hardeners with different hardening rates intended for geopolimer binder systems used for the preparation of moulding sands(2015) Bobrowski, Artur; Grabowska, Beata; Kaczmarska, KarolinaThe paper presents the results of structural investigations of hardeners with different hardening rate for geopolymer binder system Geopol, manufactured by the Sand-Team Company. Studies have shown that these hardeners have similar chemical structures and that the hardening rate of the binder depends on the proper selection of the proportions of the respective components.