Aging Effects of Aqueous Environment on Mechanical Properties of Calcium Carbonate-Modified Epoxy Resin
Artykuł w czasopiśmie
MNiSW
100
Lista 2021
| Status: | |
| Autorzy: | Rudawska Anna, Frigione Mariaenrica |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2020 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 11 |
| Wolumen/Tom: | 12 |
| Numer artykułu: | 2541 |
| Strony: | 1 - 23 |
| Web of Science® Times Cited: | 18 |
| Scopus® Cytowania: | 19 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | TAK |
| Licencja: | |
| Sposób udostępnienia: | Witryna wydawcy |
| Wersja tekstu: | Ostateczna wersja opublikowana |
| Czas opublikowania: | W momencie opublikowania |
| Data opublikowania w OA: | 30 października 2020 |
| Abstrakty: | angielski |
| The purpose of this study was to assess the effects of different aqueous environments(i.e., demineralised, distilled and spring water) on the mechanical properties of a cold-cured bisphenolicepoxy resin modified with the addition of calcium carbonate filler, typically employed as structuraladhesive. The parameters selected for the analysis have been; the kind of curing agent employed tocure the epoxy resin at ambient temperature (i.e., Mannich base and triethylenetetramine); the load ofcalcium carbonate added to liquid epoxy (i.e., from 1 to 3 g per 100 g of resin) and; the duration ofthe exposure to the different aging conditions (i.e., from 1 to 10 months). Cylindrical specimens ofcalcium carbonate-modified epoxy systems were tested in compression mode, before and after each ofthe aging regimes. The effect of the selected curing agents is very small, and they are both suitable fora cure at ambient temperature, on the unfilled epoxy on compressive maximum strength and strainat break; the choice of the hardener affects instead the compressive modulus. The CaCO3 amountwas demonstrated to have a significant effect on the mechanical characteristics of un-aged epoxysystems, leading to growth in compressive modulus and maximum strength with reductions in strainat break. Generally speaking, the aging time noticeably affects the compressive properties of calciumcarbonate-modified epoxies while almost negligible is the kind of water employed in each exposureregime. Notwithstanding the adverse effects of an aqueous environment on compressive mechanicalproperties of CaCO3-filled epoxies, these systems keep compressive modulus and maximum strengthgreater than, and close to, respectively, the same characteristics measured on unaged unfilled controlepoxies, demonstrating the positive effect of the addition of this kind of filler to epoxy-based structuraladhesives, especially with the addition of 2 and 3 g of CaCO3per 100 g resin. The results obtained inthis study demonstrated that it is possible to contrast the detrimental effects observed in cold-curedepoxy-based structural adhesives due to their aging in water upon the addition of limited amounts(particularly at 2 and 3 g per 100 g resin) of a cheap CaCO3filler |
