Abstract: Research progress in blends of PEEK with other high performance engineering plastics such as poly(ether imide) (PEI), polytetrafluoroethylene (PTFE), thermotropic liquid crystalline polymer(TLCP) and poly(ether sulfone)(PES)was reviewed, and the miscibility,crystallization behavior,morphology,thermal behavior,and mechanical properties of PEEK blends were discussed.In melt and amorphous states,PEEK is completely miscible with PEI,and their blend is generally used in the fundamental studies on the crystallization behaviors and microstructures. Blending PEEK with PTFE,TLCP and PES is an effective way to improve the friction and wear performance, processability and thermal stability.Based on these research results,further research directions and contents in PEEK blends are also anticipated.

Key words: poly（ether ether ketone）, blend, miscibility, crystallization behavior