Deformation and Thermoelastic Behavior of Poly(aryl ether ketones)

Abstract

The double-melting behavior of poly(aiyl ether ketones) (PAEKs) was detected by differential scanning calorimetry (DSC) experiments. The samples tested were poly (ether ether ketone) (PEEK) and poly(ether ketone (PEK), which have been crystallized from the glassy state at different crystallization temperatures Tc. The size and location of the lower peaks on DSC traces were affected by Tc, provided that Tc > Tg. An influence of Tc on the mechanical behavior of stretched PEEK and PEK (uniaxial deformation mode at 200 °C) was also observed. The perfection of crystalline structure was thought to be a reason for this influence. Thermoelastic experiments at room temperature, comprising simultaneous measurements of the mechanical work and of the concomitant heat, were performed on semicrystalline PAEKS. This study uses the sensitive thermoelastic technique to examine PAEK thermoelastic properties as a function of the relative abundance of ketone groups on different PAEKs. The effect of PAEK microstructure on thermoelasticity at room temperature was insignificant. This was attributed to the dominant contribution of the immobile amorphous phase on thermoelastic properties.

Tribological studies on polyetherketone composite under reciprocating sliding condition against steel cylinder

“…One such matrix is polyaryletherketones (PAEKs), which shows exceptional properties due to semi-crystalline in nature and the molecular rigidity of its repeating units. 4 PAEKs such as polyetheretherketone (PEEK), polyetherketone (PEK), polyetherketoneketone (PEKK), etc. have similar crystal structures but differ in ketone content.…”

Investigations on performance and failure mechanisms of high temperature thermoplastic polymers as adhesives

“…The structures of PEK and PEEK indicate that the ether/ketone ratio is 1:1 in PEK and 2:1 in PEEK. The ketone moiety induces higher polarity and chain rigidity which influences the mechanical properties [31]. The higher density of ketone groups in the main chain of PEK may contribute to the observed highest LSS in the group at high temperature.…”

Polyaryletherketone: Ageing Effect on Physicomechanical and Thermal properties

“…As compare to PEEK, PAEK is economic and has comparable performance. PAEK has been extensively studied for its structure, morphology, crystallization and also carbon reinforced composites [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] but gamma radiation effect is not reported yet. Therefore, PAEK has been chosen to observe the effect of gamma radiation on its physicomechanical and thermal properties.…”