| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Cross, Paul
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Topics
Publications (7/7 displayed)
- 2020A multiscale finite element model of sliding wear for cobalt-chromium undergoing ratcheting wear citations
- 2019Ratcheting wear of a cobalt-chromium alloy during reciprocated self-mated dry slidingcitations
- 2017Exchange Reactions of Poly(arylene ether ketone) Dithioketals with Aliphatic Diolscitations
- 2017Exchange reactions of poly(arylene ether ketone) dithioketals with aliphatic diols: formation and deprotection of poly(arylene ether ketal)scitations
- 2014Developing toughened aromatic polybenzoxazines using thermoplastic oligomers and telechelics, part 1:Preparation and characterization of the functionalized oligomerscitations
- 2014Developing toughened aromatic polybenzoxazines using thermoplastic oligomers and telechelics, part 1citations
- 2014Toughening mechanisms in aromatic polybenzoxazines using thermoplastic oligomers and telechelicscitations
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article
Toughening mechanisms in aromatic polybenzoxazines using thermoplastic oligomers and telechelics
Abstract
<p>2,2-Bis(3,4-dihydro-3-phenyl-2H-1,3-benzoxazine)propane (BA-a) is blended with oligomers of polyarylsulfone (PSU) and polyarylethersulfone (PES) of different low/intermediate molecular weights (3000-12 000 g mol<sup>-1</sup>) and terminal functionality (chloro-, hydroxyl- or benzoxazinyl- (Bz)). Fracture toughness (K<sub>IC</sub>) is observed to increase from 0.8 MPa m<sup>0.5</sup> for cured BA-a to 1 MPa m<sup>0.5</sup> with the incorporation of 10 wt % PSU-Bz (12 000 g mol<sup>-1</sup>). Generally, greater improvements in K<sub>IC</sub> are observed for the PES oligomers compared with the PSU oligomers of equivalent molecular weight. The terminal functionality of the thermoplastic has a lesser effect on improving toughness than increasing the molecular weight or the nature of the polymer backbone. Surface analysis of the fractured surfaces show greater phase separation and crack pinning in the PES toughened system. Where crack pinning is less obvious, as in the case of hydroxyl-terminated PES (of 6000 g mol<sup>-1</sup>), this coincides with a drop in fracture toughness.</p>