High performance nanocomposites from Ti₃SiC₂ MAX phase and phthalonitrile resin

Abstract

A new kind of nanocomposites was prepared from a high performance phthalonitrile resin and Ti3SiC2 MAX phase ceramic nanoparticles. The synergistic combination of both phases led to nanocomposites with improved thermal and mechanical properties. For instance, the thermal conductivity and tensile properties of the neat resin were highly enhanced on adding more nanofillers contents. Moreover, the phthalonitrile resin toughness was enhanced by 123% at the maximum nanoparticles loading of 15 vol.%. The experimental investigations were also compared with predictions from Series, Halpin‐Tsai, and Kerner models and a full discussion was provided. A high resolution transmission electron microscope confirmed the ability of the MAX phase to create a conductive network, especially at high nanofillers amounts. SEM analyses of the tensile fractured surfaces revealed positive changes in the morphology, such as an increase in the roughness and amount of hackling as well as the formation of multiple micro‐cracks. The MAX phase also enhanced the thermal stability, stiffness, and glass transition temperature of the neat resin. This work confirms the superiority of the MAX phase ceramics over the traditional ones in enhancing the properties of the phthalonitrile resin and opens the way for further research in the field. POLYM. COMPOS., 39:3705–3711, 2018. © 2017 Society of Plastics Engineers

Novel self-promoted phthalonitrile monomer with siloxane segments: synthesis, curing kinetics, and thermal properties

“…The T g value of poly(TSOP), recorded as 348 °C, was much higher than those of benzophenone-center bisphenol-A based PN [poly(BBaph)], 34 cardanol-based PN [poly(CPN)], 35 thioether bonded PN [poly(BSDP)], 45 and bisphenol-A based PN [poly(Baph)] polymers 46 due to the existence of the active hydrogen atoms from secondary amino groups in the TSOP monomer. The TSOP monomers’ autocatalytic crosslinking reaction can take place without any additives, which can be an effective way to avoid the voids or defects caused by small molecules and low heat-resistant polymers and increase the crosslinking density of poly(TSOP).…”

Preparation and characterization of a high heat resistant phthalonitrile resin modified by polyborosilazane ceramic precursor

“…Thermal mechanic properties including the tan delta (Tan δ ) and storage modulus ( E ′) were investigated for the composites. In DSC curves, the temperature in the middle of the inclined region was estimated as the Tg 31,32 . The DSC curves of hybrid matrix samples were performed at two successive heating cycles up to 700°C under an air atmosphere.…”

Synthesis and properties of a novel autocatalytic phthalonitrile monomer and its copolymerization with multi‐functional fluorene‐based benzoxazine monomers

“…In this paper, the synthesized OPD monomer has excellent processability, but it also has many disadvantages which need to be improved, for example, high curing temperature, high brittleness, and poor toughness for poly(OPD). Several improvement techniques have been applied to overcome the deficiencies such as the reinforcement of solid phases as Ti 3 SiC 2 MAX phase, 53 basalt fibers, 54 and boron nitride, 11 and copolymerization with other advanced materials like phenol–aniline‐based benzoxazine (P‐a) 55,56 and difunctionalbisphenol A–aniline based benzoxazine (BA‐a) 55 . We choose octylamine‐based ( t ‐BF‐sa‐o) and diethyleneglycolamine‐based ( t ‐BF‐sa‐dca) fluorene‐based benzoxazine monomers to modify OPD monomer by copolymerization as they have better toughness as compared to poly(P‐a) and poly(BA‐a) thermosets.…”