CARDO POLYARYLETHERSULFONES AND POLYARYLETHERKETONES BEARING ALKYL SUBSTITUENTS ON THE PHENYLENE UNIT

Abstract

A series of cardo polyaryletherketones and polyaryletersulfones containing alkyl substituents of a different kind, number and volume were synthesized from bis(4-nitrophenyl)ketone or bis(4-fluorophenyl)sulfone with various alkyl substituted phenol-phthaleins by polycondensation using K₂CO₃ as catalyst. Their chemical and aggregation structures were confirmed by FT-IR, ¹H-NMR and WAXD. The resulting polymers were soluble in a variety of common polar solvents and, transparent, colorless, and tough films could be easily cast from 1,1,2-trichluoroethane solution. Their tensile strength, elongation at break and tensile modulis were in the range of 70.5∼97.1MPa, 4.49%∼7.81%, and 1.69∼2.27GPa, respectively. The prepared polymers had reasonably high glass transition temperatures at 207 to 269°C, and showed fairly good thermal stability with 5% thermal decomposition loss above 410°C.

Keywords:

• Polyaryletherketone
• Polyarylethersulfone
• Substituents
• Membrane materials Synthesis and Characterization
• High Glass Transition Temperature

Acknowledgments