Crystallization behavior and mechanical properties of poly(aryl ether ether ketone)/poly(ether imide) blends

1996 ◽  
Vol 36 (16) ◽  
pp. 2119-2128 ◽  
Author(s):  
Mariaenrica Frigione ◽  
Carlo Naddeo ◽  
Domenico Acierno
Keyword(s):  
Mechanical Properties ◽  
Crystallization Behavior ◽  
Aryl Ether ◽  
Ether Ether Ketone ◽  
Ether Ketone

Preparation of poly(ether ether ketone)-based composite with high electrical conductivity, good mechanical properties and thermal stability

2016 ◽  
Vol 29 (2) ◽  
pp. 205-210 ◽  
Author(s):  
Yu Jin Lin ◽  
Shi Qin ◽  
Bing Han ◽  
Cong Gao ◽  
Shu Ling Zhang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Electrical Conductivity ◽  
High Electrical Conductivity ◽  
Aryl Ether ◽  
Good Thermal Stability ◽  
Ether Ether Ketone ◽  
Peek Composite ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

Poly(ether ether ketone)-based (PEEK-based) composites with high electrical conductivity, good mechanical properties, and thermal stability were prepared using multiwall carbon nanotubes (MWCNTs) as a conductive filler and the liquid crystalline copolymer of poly(aryl ether ketone) (FPEDEKKLCP) as a processing aid. The composites were fabricated using melt blending, and the MWCNT/PEEK composites with FPEDEKKLCP exhibited an obvious improvement in the measured electrical conductivity relative to the MWCNT/PEEK composite without FPEDEKKLCP. Moreover, the MWCNT/PEEK composites exhibited good mechanical properties and thermal stability after addition of an appropriate amount of FPEDEKKLCP. This is attributed to the good thermal stability of FPEDEKKLCP, wherein addition of FPEDEKKLCP effectively decreased the melt viscosity of the MWCNT/PEEK composites, accompanied by an improvement in the dispersion of the MWCNTs in the PEEK matrix.

Effect of the Thermal History of the Melt on the Degradation of the Surface Mechanical Properties of Poly(aryl-ether-ether-ketone) as Measured by Microindentation

1992 ◽  
Vol 4 (2) ◽  
pp. 109-121 ◽  
Author(s):  
Yves Deslandes ◽  
François Boudreau
Keyword(s):  
Mechanical Properties ◽  
Thermal History ◽  
Polymer Surface ◽  
Morphological Characteristics ◽  
Molten State ◽  
Aryl Ether ◽  
Total Change ◽  
Ether Ether Ketone ◽  
History Of ◽  
Ether Ketone

In this study, the effect of the thermal history of the melt on the morphology and the mechanical properties of the surface of crystallized poly(aryl-ether-ether-ketone) (PEEK) films was followed by density measurements, X-ray diffraction, differential scanning calorimetry and microindentation. The study has shown a decrease in microhardness of the polymer surface as the temperature at which the polymer is kept in the molten state increases and as the time spent in the molten state becomes longer. The study suggests that keeping PEEK for long periods of time in the molten state, in the presence of oxygen, results in chemical changes (presumably crosslinking involving oxygen atoms) which are responsible for drastic changes in the morphological characteristics of the samples and consequently on the mechanical properties of the surface of the solidified material. Above 400 °C, in air, a total change in surface morphology takes place and the mechanical properties of the surface are degraded. The study also suggests that the negative effects of degradation can be avoided to a large extent if the samples are melted at temperatures below 385 °C for short periods of time and kept from oxygen exposure.

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