Compatibilization effect of aminated poly(phthalazinone ether ketone)s in carbon fiber‐reinforced copoly(phthalazinone ether sulfone)s composites

Abstract

In this study, a kind of aminated poly(phthalazinone ether ketone)s (PPEK‐NH2s) with amino groups on side chains were synthesized by the condensation polymerization of 4‐(4‐Hydroxylphenyl)(2H)‐phthalazin‐1‐one (DHPZ), 4,4′‐difluoro benzophenone (DFK), and the third active monomer (4‐Amino)phenylhydroquinone (4‐AmPHQ). Then, PPEK‐NH2s were employed as compatibilizers to enhance the interfacial adhesion of carbon fiber (CF) reinforced copoly(phthalazinone ether sulfone)s (PPBES) composites. Differential scanning calorimetry and thermogravimetric analysis profiles indicate that PPEK‐NH2s exhibit more impressive thermal behaviors than PPBES. CF/PPBES composites with 5 wt% compatibilizers based on PPBES were fabricated by solution impregnation and compression molding. The as‐made CF/PPBES/PPEK‐NH2 (4) demonstrates the highest interlaminar shear strength and flexural strength with increasement of 12.7% and 16.8%, respectively. Meanwhile, this composite exhibits excellence in hydrothermal aging tests. Moreover, the strengthening mechanisms of CF/PPBES composites with PPEK‐NH2s could be attributed to both chemical and physical interaction between the matrix and CFs owing to amino groups. Therefore, these compatibilizers offer new insights for fabricating high‐performance advanced thermoplastic composites. POLYM. COMPOS., 39:4139–4147, 2018. © 2017 Society of Plastics Engineers

Effects of polyetherimide sizing involving carbon nanotubes on interfacial performance of carbon fiber/polyetheretherketone composites

“…As a flexible layer which is typically applied on CF surface, the sizing agent acts an important role on the application of CF, which endows CF with high processing stability and surface quality 17,18 . On the other hand, many research studies 19–22 prove the relevance of sizing process and the improvement of interfacial properties of composites. For example, Yuan et al 23 synthesized semi‐aliphatic polyimide as CF sizing agent, and the interlaminar shear strength (ILSS) and flexural strength of CF/PEEK raised by 23.8% and 7.8%.…”

Effect of Sizing Agents on Surface Properties of T800 Grade CF and Thermal Aging Time on Mechanical Properties of T800 Grade CF/Epoxy Composites

“…Among them, molecular weight is considered as an important factor influencing on surface roughness and thermal stability. When applying CF reinforced epoxy matrix composites, actual service life was affected by environment elements, such as temperature, humidity, and ultraviolet light [20]. Thermal aging was pointed out as a main form of composite corrosion failure, which decreased mechanical properties in long time service [21].…”

Facile preparation of hyperbranched polysiloxane‐grafted carbon fibers with improved interfacial strength of silicone resin composites

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