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Citation: WEI Yong-Hui, CHEN Biao. Investigation on Compatibility and Mechanical Properties of PEEKK/PEI Blends[J]. Chinese Journal of Applied Chemistry, ;2008, 25(8): 977-979. shu

Investigation on Compatibility and Mechanical Properties of PEEKK/PEI Blends

WEI Yong-Hui ^, ,
CHEN Biao

1.
College of Chemistry and Biology, Beihua University, Jilin 132013

Corresponding author: WEI Yong-Hui,
Received Date: 21 February 2008
Available Online: 28 May 2008

PEEKK/PEI blends were prepared via melting extrusion at 380℃. The compatibility, crystallization behavior and mechanical properties of the blends were investigated by DSC, WAXD and UTM. The results show that the blends of PEEKK/PEI were compatible completely, all the blends exhibited a single glass transition temperature, and could be described by Fox equation. With increasing the content of PEI, the cold crystallization temperatures of the blends increased from 208℃ to 280℃, the melting crystallization temperatures decreased from 315℃ to 260℃, the melting points also decreased from 363℃ to 322℃, and melting enthalpy varied between -31.5 J/g and -2.2 J/g. The blends show good mechanical properties. With increasing the content of PEI, the elongation of blends at break increased from 25% to 60%, illuminating that PEI could improve the toughness of PEEKK.
- PEEKK,
- PEI,
- compatibility,
- blend,
- mechanical properties
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