Improved syntheses of poly(oxy-1,3-phenylenecarbonyl-1,4-phenylene) and related poly(ether–ketones) using polyphosphoric acid/P2O5 as polymerization medium

• Published in: Polymer (Guilford) Vol. 44; no. 15; pp. 4135 - 4147
• Main Authors: Baek, Jong-Beom, Tan, Loon-Seng
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier 01.07.2003
• Subjects: Applied sciences; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Phosphorus oxide; Phenylene oxide copolymer; Solution polycondensation; Self condensation; Ether copolymer; Experimental study; Optimization; Thermal stability; Operating conditions; Ketone copolymer; Benzoic acid derivatives; Poly(phosphoric acid); Electrophilic substitution; Polyphosphoric acid; Preparation; Aromatic copolymer; Alternating copolymer; Thermostable; AB monomer; Poly(ether-ketones)

Based on the model-compound studies, the composition of polyphosphoric acid (PPA)/P2O5 mixture as an effective catalytic/dehydrative medium for the preparation of poly(ether-ketones) was optimized. Thus, with the optimal weight ratio of 4:1 (PPA:P2O5), the electrophilic substitution polycondensation...