Polyaryletherketone (PAEK) thermoplastic composites via in-situ ring opening polymerisation

Catechol-based macrocyclic aromatic ether-sulfones: synthesis, characterization and ring-opening polymerization

“…28 More recently, o-PEEK macrocycles have been employed to fabricate carbon fibre composites via ring opening polymerization reactions. 29 The present study might also lead the way to novel in-situ fabrication of high performance thermoplastic composites.…”

“…31 Chart 2. (a) Catechol-based macrocyclic aromatic ether-ketones 28,29 ; (b) Catechol-based aromatic poly(esterimide)s (R = H, Me, or t-Bu). 30 In the present work, we report the synthesis, characterization, and entropy-driven ring-opening polymerization of a novel series of macrocyclic aromatic (ether-sulfone)s derived from catechol by nucleophilic cyclo-condensation with extended aromatic dichloro-compounds, activated towards nucleophilic (SNAr) substitution by the presence of sulfone groups para to the chloro-substituents.…”

ED-ROP of macrocyclic oligomers: A synthetic tool for multicomponent polymer materials

“…54 More dated research regarded composites containing carbon fibers or nanofibers were obtained by starting from cyclic polycarbonate oligomers, 11,96,97 while more recent works reported the use of cyclic (arylene disulfide) oligomers 98 and aryl ether ketone macrocycles. 99 Song et al 98 prepared composites of poly(arylene disulfide) (PADS) reinforced with short CF by in-situ ED-ROP of cyclo(4,4'-oxybis(benzene)disulfide) (COBDS, see Chart 1) upon melt molding carried out in air at 200 °C for 30 min without catalyst. Compared to neat PADS, PADS/short CF composites are characterized by improved flexural modulus and strength due to the good adhesion between the in-situ formed PADS matrix and CF reinforcement.…”

“…Compared to neat PADS, PADS/short CF composites are characterized by improved flexural modulus and strength due to the good adhesion between the in-situ formed PADS matrix and CF reinforcement. Misasi et al 99 very recently applied this ED-ROP approach to the development of PAEK-based composites containing CF. Cesium fluoride was used as a catalyst and ED-ROP of the corresponding MCOs was carried out in nitrogen atmosphere for 30 min at temperatures ranging from 280 and 300 °C while applying pressures from 500 to 1000 kPa.…”

Novel tooling for direct melt impregnation of textile with variotherm injection moulding: Methodology and proof of concept

“…This method was applied to polyamide (PA) 9 and more recently to polymethylmethacrylate (PMMA) 10 and polyaryletherketone (PAEK). 11 Some obstacles still have to be overcome however, for instance the high sensitivity of the process to residual moisture content and contaminations in the case of polyamide, which can lead to incomplete polymerisation and makes it difficult to control in an industrial environment. 12 Other approaches are based on novel thermoplastics with a very low melt viscosity that have been introduced to the market over the past few years.…”