%0 Journal Article
%T Synthesis of poly(ether ketone amide)s by a heterogeneous palladium
%A Bin Huang
%A Mingzhong Cai
%A Pingping Wang
%A Xiaojun Zhu
%J High Performance Polymers
%@ 1361-6412
%D 2019
%R 10.1177/0954008318781700
%X A series of novel aromatic poly(ether ketone amide)s (PEKAs) were synthesized by the heterogeneous palladium-catalyzed carbonylative polycondensation of aromatic diiodides with ether ketone units, aromatic diamines, and carbon monoxide in N,N-dimethylacetamide (DMAc) at 120¡ãC using 6 mol% of a magnetic nanoparticles¨Csupported bidentate phosphine palladium complex (Fe3O4@SiO2-2P-PdCl2) as catalyst and 1,8-diazabicyclo[5,4,0]-7-undecene as base. The PEKAs had inherent viscosities ranging from 0.61 dl g£¿1 to 0.75 dl g£¿1. All the PEKAs were soluble in strong dipolar organic solvents. These PEKAs showed glass transition temperatures between 178¡ãC and 232¡ãC and 10% weight loss temperatures ranging from 443¡ãC to 496¡ãC in nitrogen. These PEKAs could be cast into transparent, flexible, and strong films from DMAc solutions with tensile strengths of 72.8¨C82.6 MPa, tensile moduli of 2.19¨C2.84 GPa, and elongations at break of 5.4¨C7.5%. Importantly, the heterogeneous palladium catalyst can be conveniently recovered from the reaction mixture by simply applying an external magnet and recycled up to eight times without significant loss of activity
%K Poly(ether ketone amide)
%K palladium-catalyzed carbonylation
%K carbon monoxide
%K polycondensation
%K heterogeneous catalysis
%U https://journals.sagepub.com/doi/full/10.1177/0954008318781700