Rheological, Mechanical and Morphological Characterization of Fillers in the Nautical Field: The Role of Dispersing Agents on Composite Materials
| Autor: | Silvia Vicini, Per Borchardt, Rico Ricotti, Emiliano Pinori, Maila Castellano, Andrea Dodero, Silvia Vita |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Steric effects
Materials science Polymers and Plastics Ionic bonding 02 engineering and technology mechanical properties 010402 general chemistry 01 natural sciences Article lcsh:QD241-441 lcsh:Organic chemistry Rheology nautical fillers morphological characterization Composite material Polymeric matrix extender‐matrix interactions General Chemistry 021001 nanoscience & nanotechnology dispersing agents 0104 chemical sciences Glass microsphere Payne effect rheological properties extender-matrix interactions 0210 nano-technology |
| Zdroj: | Polymers Volume 12 Issue 6 Polymers, Vol 12, Iss 1339, p 1339 (2020) |
| ISSN: | 2073-4360 |
| DOI: | 10.3390/polym12061339 |
| Popis: | Coatings have a fundamental role in covering the external surface of yachts by acting both as protective and aesthetic layers. In particular, fillers represent the essential layer from the point of view of mechanical properties and consist of a polymeric matrix, different extenders and additives, and dispersing agents, with the latter having the role to provide good extender-matrix compatibility. In the present work, the effects of dispersing agents with an ionic or steric action on the interactions between hollow glass microspheres and an epoxy-polyamide resin are evaluated. Un-crosslinked filler materials are studied via rheological tests, whereas the mechanical and morphological properties of the crosslinked samples are assessed. The results clearly indicate that steric dispersing agents provide a much greater compatibility effect compared to ionic ones, owing to their steric hindrance capability, thus leading to better-performing filler materials with a less-marked Payne effect, which is here proved to be an efficient tool to provide information concerning the extent of component interactions in nautical fillers. To the best of our knowledge, this work represents the first attempt to deeply understand the role of dispersing agents, which are until now empirically used in the preparation of fillers. |
| Databáze: | OpenAIRE |
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