Novel polyaryletherketones containing various pendant groups. I. Synthesis and characterization

✍ Scribed by Zhonggang Wang; Tianlu Chen; Jiping Xu

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 191 KB
• Volume: 63
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19970228)63:9<1127::aid-app4>3.0.co;2-j

✦ Synopsis

Novel high glass transition temperature polyaryletherketones, containing pendant amido, alkyl, and carboxyl groups with reduced viscosity above 0.54 dL/g, were synthesized via solution nucleophilic polycondensation reaction of phenolphthalin, 2,2Љ-diisopropyl-5,5Љ-dimethylphenolphthalin, and 3,3 -bis(4-hydroxyphenyl)isobenzopyrrolidone with bis(4-nitrophenyl)ketone in the presence of potassium carbonate. By ion exchange with Na / and K / , four ionomers were also prepared. A new monomer simultaneously containing carboxyl and alkyl substituents was synthesized by reduction reaction of 2,2Љ-diisopropyl-5,5Љ-dimethyl-phenolphthalein. The resulting polymers were soluble in a few polar aprotic solvents; transparent, colorless, and tough films could easily be cast from DMF or DMSO solution. The mechanical properties of the films were excellent; and their tensile strength, elongation at break, and tensile moduli were in the range of 67.1-97.1 MPa, 7.8-165%, and 1.47-2.27 GPa, respectively. The prepared polymers showed fairly good thermal stability and resonably high glass transition temperatures above 210ЊC.