Formation of glass transition temperature-less (Tg-less) composite with epoxy resin and ionomer
| Autor: | Satoshi Matsuda, Hisatoshi Ueda, Hajime Kishi, Hirofumi Nishida, Atsushi Murakami |
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| Rok vydání: | 2007 |
| Předmět: |
Materials science
Chain propagation Renewable Energy Sustainability and the Environment General Chemical Engineering Dynamic mechanical analysis Epoxy Ring-opening polymerization chemistry.chemical_compound Anionic addition polymerization chemistry visual_art Polymer chemistry visual_art.visual_art_medium Composite material Glass transition Waste Management and Disposal Ionomer Curing (chemistry) |
| Zdroj: | Asia-Pacific Journal of Chemical Engineering. 2:63-69 |
| ISSN: | 1932-2143 1932-2135 |
| DOI: | 10.1002/apj.28 |
| Popis: | A Tg-less epoxy resin was easily obtained by curing with ionomer. In this system, the storage modulus did not drop and maintained a high level as if it were in a glassy state even at an elevated temperature of 300 °C. Investigation of the curing process for the epoxy resin mixture with ionomer, using DSC and FT-IR, revealed that the curing reaction was initiated from the nucleophilic addition of—COO− to the epoxy group to form an ester linkage, and that the chain propagation subsequently occurred by anionic ring opening polymerization of the epoxy group to form an ether linkage. On the basis of the results, the mechanism of ‘Tg-disappearing phenomenon’ is also discussed. Copyright © 2007 Curtin University of Technology and John Wiley & Sons, Ltd. |
| Databáze: | OpenAIRE |
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