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Synthesis and characterization of poly(ether amide ether ketone)/poly(ether ketone ketone) copolymers
Author(s) -
Huang Bin,
Zhu Meihua,
Cai Mingzhong
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.32723
Subject(s) - terephthaloyl chloride , ketone , ether , polymer chemistry , copolymer , condensation polymer , amide , diphenyl ether , monomer , thermal stability , materials science , chemistry , organic chemistry , polymer
A new monomer, N,N′‐ bis(4‐phenoxybenzoyl)‐ m ‐phenylenediamine (BPPD), was prepared by condensation of m ‐phenylenediamine with 4‐phenoxybenzoyl chloride in N,N ‐dimethylacetamide (DMAc). A series of novel poly(ether amide ether ketone) (PEAEK)/poly(ether ketone ketone) (PEKK) copolymers were synthesized by the electrophilic Friedel‐Crafts solution copolycondensation of terephthaloyl chloride (TPC) with a mixture of diphenyl ether (DPE) and BPPD, over a wide range of DPE/BPPD molar ratios, in the presence of anhydrous AlCl 3 and N ‐methylpyrrolidone (NMP) in 1,2‐dichloroethane (DCE). The influence of reaction conditions on the preparation of copolymers was examined. The copolymers obtained were characterized by different physicochemical techniques. The copolymers with 10–25 mol % BPPD were semicrystalline and had remarkably increased T g s over commercially available PEEK and PEKK due to the incorporation of amide linkages in the main chains. The copolymers III and IV with 20–25 mol % BPPD had not only high T g s of 184–188°C, but also moderate T m s of 323–344°C, having good potential for the melt processing. The copolymers III and IV had tensile strengths of 103.7–105.3 MPa, Young's moduli of 3.04–3.11 GPa, and elongations at break of 8–9% and exhibited outstanding thermal stability and good resistance to organic solvents. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011