Newly formed tannin-based insulating foams have been studied for this thesis. The temperature during the foam formation reaction was measured, along with the size of the bubbles (pores) in the foam, and the density of individual foams was calculated. A total of 11 different tannin foam compositions were prepared. The basic foam composition was formulated using a 12:10:8 ratio of furfuryl alcohol, tannin, and catalyst. The proportion of tannin was gradually reduced to 5 units, while the proportions of other components remained unchanged. The catalyst proportion was varied from 6 to 11 units, while all other components were unchanged. The reaction temperature was measured during foam formation, assessed the size of the bubbles (pores) in the foam, and calculated the density of each foam. The produced foams were sawn into several pieces, and bubble sizes were measured objectively across the entire foam using a standard ruler. Foam weight was recorded, and foam edges were then measured using callipers. The results indicate that the proportion of tannin or catalyst does not significantly affect the temperature generated during the reaction. However, the proportion of catalyst has a notable impact on foam formation time, as an insufficient amount of catalyst can inhibit the reaction. The proportion of tannin influences the overall foam size, while the proportions of both tannin and catalyst determine the bubble size. A low proportion of tannin results in large surface bubbles, while an insufficient proportion of catalyst fails to initiate the reaction, resulting in little foam formation. Foams with appropriate proportions of tannin and catalyst are larger and more homogeneous. The density of the foams is strongly affected by the proportion of tannin. Specifically, it decreases as the tannin content is reduced.
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