The effect of matrix on shape properties of aromatic disulfide based epoxy vitrimers
| Autor: | Alaitz Rekondo, Alaitz Ruiz de Luzuriaga, Itxaso Azcune, Eduardo Saiz, Arrate Huegun |
|---|---|
| Přispěvatelé: | Office Of Naval Research Global |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Polymers and Plastics Polymers 0904 Chemical Engineering General Physics and Astronomy Ether 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Materials Chemistry Molecule 0912 Materials Engineering Bisphenol A diglycidyl ether chemistry.chemical_classification Organic Chemistry 0303 Macromolecular and Materials Chemistry Epoxy Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Monomer chemistry Vitrimers Chemical engineering Covalent bond visual_art visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | European Polymer Journal. 148:110362 |
| ISSN: | 0014-3057 |
| DOI: | 10.1016/j.eurpolymj.2021.110362 |
| Popis: | Aromatic disulfide based vitrimers show elasticity driven shape-memory and plastic reprocessability via associative rearrangement of dynamic covalent crosslinks. Those processess represent the two sides of a coin: the storage and relaxation of the strain energy caused by a deformation load. The key temperatures that trigger the underlying mechanisms, i.e. phase transition and disulfide exchange reaction, are extremely sensitive to the molecular structure of the polymer and under certain condition overlap. To gain insight on the relationship between the structure, dynamic and shape-changing properties, five aromatic disulfide-based epoxy networks with a range of Tg values (32–142 °C), molecular structure and crosslink densities (2252–462 mol m−3) were synthesized. The epoxy matrices were formulated combining different ratios of rigid bisphenol A diglycidyl ether (DGEBA) and flexible poly(propylene glycol) diglycidic ether (DGEPPG) epoxy monomers crosslinked by 4-aminophenyldisulfide hardener. |
| Databáze: | OpenAIRE |
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