Abstract
In this study, the rheological parameters as well as Flory–Huggins parameter determined by Inverse Gas Chromatography (IGC) were applied for assessment of the changes occurring during storage of the resole resin and their composites. It was proved that storage of resole and its composites at the low temperature (about 10°C) can slow significantly the process of their aging. Main idea of research was to determine time dependence of rheological properties for resole resin. These data should enable to extend shelf life of resin containing products. The rheological properties of samples were studied by the determination of flow curve. Share rate was changed from 10 to 500 1/s. Samples were examined in following intervals (increasing storage time): immediately after preparing the sample and then after storage, respectively: after two, four, eight, and twelve weeks. To extend shelf life of resin, it was mixed with different additives: zeolite Micro 20, Mg(OH)2, PAF, synthetic zeolites: sodium form Z1, hydrogen form Z2. Flory–Huggins parameter determined by use of IGC let to assess physicochemical changes occurring in resole and its composites during storage. IGC turned out to be more sensitive method for assessment of changes occurring during resin aging than rheological measurements. FTIR technique was used to assess chemical changes occurring during resoles compositions storage. It indicated that oxidation reaction can occur during resoles composite aging.
Published Version
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