Glass fibres reinforced acrylic thermoplastic resin-based tri-block copolymers composites: Low velocity impact response at various temperatures

Characterization of polylactic acid/halloysite nanotubes bionanocomposite films for food packaging

In this work, a uniformly aligned polyethersulfone (PES) fiber web was designed and fabricated by the melt-spinning PES yarns. Such fiber web was adopted as an interleave to simultaneously improve both mode I and mode II fracture toughness of the carbon fiber/epoxy composite, addressing the issue of transforming the thermoplastic component into a well-controlled uniform and ordered phase structure without being influenced by the liquid forming process. The dissolution behaviors of the PES filaments in the epoxy resin were studied by the optical microscopy with a hot stage. The results indicated that the PES filaments were not dissolvable at the temperature of the resin infusion process, but could be dissolved during the curing process of the epoxy resin in a well controllable way and period. Both the mode I and mode II interlaminar fracture toughness of the composites were investigated as a function of areal densities of the PES fiber webs (7.3, 14.7, 21.2 and 28.3 gsm) carefully. A maximum enhancement up to 120% and 68.8% on mode I and II fracture toughness, respectively was obtained with the introduction of the 28.3 gsm-PES fiber web compared to the laminates without interleaves. Analysis of the fracture surfaces of the laminates elucidated that the distinctive improvement of the interlaminar fracture toughness could be attributed to the characteristic interlaminar structures induced from the phase separation of PES in epoxy resin. Moreover, the interleaved laminates displayed an increase of 18.2% and 43.8% for the interlaminar shear strength (ILLS) and compression-after-impact (CAI) properties, respectably. The tensile and flexural properties of the composite were thereafter explored which indicated slightly enhancement on the strengths.

Simultaneously improving mode I and mode II fracture toughness of the carbon fiber/epoxy composite laminates via interleaved with uniformly aligned PES fiber webs

Innovative acrylic thermoplastic composites versus conventional composites: Improving the impact performances

Synergistically effects of copolymer and core-shell particles for toughening epoxy

Influence of thermoplastic diffusion on morphology gradient and on delamination toughness of RTM-manufactured composites Part A Applied science and manufacturing

Specific influence of polyethersulfone functionalization on the delamination toughness of modified carbon fiber reinforced polymer processed by resin transfer molding

In this work, polyethersulfone (PES)/halloysite nanotube (HNTs) nanocomposites are prepared via a water-assisted extrusion process using ‐Cl or ‐OH groups at PES chain ends. The influence of PES chain ends and/or water injection on halloysite dispersion is investigated by scanning electron microscopy. A better dispersion of nanoclay inside the polymeric material is observed for PES with ‐OH chain ends (PES-OH), while water seems to have almost no effect of the filler dispersion. Based on first morphological results, only PES-OH/HNTs nanocomposites are kept for further investigations. Thermal stability of neat polymer and nanocomposites is studied under both air and nitrogen atmospheres. The presence of halloysite increases the initial thermal degradation temperature of PES due to an improved barrier to mass transfer. The flammability is also investigated combining UL-94 and cone calorimeter tests. The lowest flammability is achieved at the highest HNTs loading.

Thermal and fire behavior of polyethersulfone/halloysite nanotube nanocomposites

The present work aims to evaluate the distribution of two selected thermoplastic (TP), phenoxy or polyethersulfone (PES), and non-functionalized Multi-Walled Carbon Nanotubes (MWCNTs) in the epoxy matrix of composite panels processed via Resin Transfer Moulding. The concept developed consider that nanocomposites made from a amorphous TP and filler can be dissolve by epoxy resin precursors, while the TP can act as carrier of fillers distribution toward the resin. The MWCNTs follow the thermoplastic diffusion. The impacts of the TP solubility and filler distribution on mechanical and physical properties of the resulting composites panels are investigated. Rather than phenoxy give a rise in the fracture toughness (GIC) due to its better compatibility with epoxy precursors, PES seems to enhance fire properties of resulting composite laminates.

Thermplastic as carrier of nanofillers into carbon fibre : epoxy resin composites: influence of thermoplastic solubility on carbon nanotubes distribution

E. Henry

Papers

Influence of thermoplastic diffusion on morphology gradient and on delamination toughness of RTM-manufactured composites Part A Applied science and manufacturing

Specific influence of polyethersulfone functionalization on the delamination toughness of modified carbon fiber reinforced polymer processed by resin transfer molding

Thermal and fire behavior of polyethersulfone/halloysite nanotube nanocomposites

Thermplastic as carrier of nanofillers into carbon fibre : epoxy resin composites: influence of thermoplastic solubility on carbon nanotubes distribution