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- Title
Synergy between Phenoxy and CSR Tougheners on the Fracture Toughness of Highly Cross-Linked Epoxy-Based Composites.
- Authors
Van Velthem, Pascal; Gabriel, Sarah; Pardoen, Thomas; Bailly, Christian; Ballout, Wael
- Abstract
A remarkable synergistic increase in fracture toughness by 130% is demonstrated for a CFRP high performance epoxy composite when adding an equal weight combination of phenoxy thermoplastic and core-shell rubber (CSR) toughening agents, as compared to a single toughener at a comparable total concentration of around 10 wt%. The dual-toughened matrix exhibits an unusual morphological arrangement of the two toughener agents. The interlaminar shear strength of the composites is also synergistically improved by about 75% as compared to the reference while the compression modulus reduction and viscosity increase are significantly smaller than for the single phenoxy toughened system. A partial filtering of the CSR particles by the dense CF fabric during pre-pregging leads to a less than optimum CSR dispersion in the composites, showing that the synergy can be further optimized, possibly to the same level as the unreinforced systems.
- Subjects
FRACTURE toughness; SOCIAL responsibility of business; THERMOPLASTIC elastomers; SHEAR strength; POLYMERIC composites
- Publication
Polymers (20734360), 2021, Vol 13, Issue 15, p2477
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym13152477