Quantitative nanoscale measurements of the thermomechanical properties of poly‐ether‐ether‐ketone ( PEEK )

2020 ◽  
Vol 58 (11) ◽  
pp. 1544-1552
Author(s):  
Wen Qian ◽  
Wenlong Li ◽  
Charles Nguyen ◽  
Tyler J. Johnson ◽  
Joseph A. Turner
Keyword(s):  
Thermomechanical Properties ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Nanoscale Measurements

scholarly journals Melt-Processed Poly(Ether Ether Ketone)/Carbon Nanotubes/Montmorillonite Nanocomposites with Enhanced Mechanical and Thermomechanical Properties

Materials ◽  
2019 ◽  
Vol 12 (3) ◽  
pp. 525 ◽  
Author(s):  
Ruixue Ma ◽  
Bo Zhu ◽  
Qianqian Zeng ◽  
Pan Wang ◽  
Yaming Wang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermomechanical Properties ◽  
Scanning Calorimetry ◽  
Melt Mixing ◽  
Maximum Increase ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Negative Effect ◽  
Ether Ketone ◽  
The Cost

The agglomeration problem of nanofillers, for instance, carbon nanotubes (CNTs) in a poly(ether ether ketone) (PEEK) matrix, is still a challenging assignment due to the intrinsic inert nature of PEEK to organic solvents. In this work, organically modified montmorillonite (MMT) was introduced as a second filler for improving the dispersion of CNTs in the PEEK matrix and enhancing the mechanical properties, as well as reducing the cost of the materials. The nanocomposites were fabricated through melt-mixing PEEK with CNTs/MMT hybrids, which were prepared in advance by mixing CNTs with MMT in water. The introduction of MMT improved the dispersion stability of CNTs, as characterized by sedimentation and zeta potential. The CNTs/MMT hybrids were maintained in PEEK nanocomposites as demonstrated by the transmission electron microscope. The mechanical and thermomechanical measurements revealed that CNTs together with MMT had a strong reinforcement effect on the PEEK matrix, especially at high temperature, although it had a negative effect on the toughness. A maximum increase of 48.1% was achieved in storage modulus of PEEK nanocomposites with 0.5 wt% CNTs and 2 wt% MMT at 240 °C, compared to that of neat PEEK. The differential scanning calorimetry results revealed that CNTs accelerated the crystallization of the PEEK matrix while a further addition of MMT played an opposite role. The nucleation activity of the fillers was also evaluated by the Dobreva method.

scholarly journals Alleviating the Mechanical and Thermal Degradations of Highly Sulfonated Poly(Ether Ether Ketone) Blocks via Copolymerization with Hydrophobic Unit for Intermediate Humidity Fuel Cells

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1346 ◽  
Author(s):  
Ae Kim ◽  
Mohanraj Vinothkannan ◽  
Chul Park ◽  
Dong Yoo
Keyword(s):  
Local Density ◽  
Condensation Reaction ◽  
Phase Variation ◽  
Thermomechanical Properties ◽  
Polymer Backbone ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Poly Condensation ◽  
Sulfonated Poly

In this contribution, sulfonated poly(ether ether ketone) (SPEEK) is inter-connected using a hydrophobic oligomer via poly-condensation reaction to produce SPEEK analogues as PEMs. Prior sulfonation is performed for SPEEK to avoid random sulfonation of multi-block copolymers that may destroy the mechanical toughness of polymer backbone. A greater local density of ionic moieties exist in SPEEK and good thermomechanical properties of hydrophobic unit offer an unique approach to promote the proton conductivity as well as thermomechanical stability of membrane, as verify from AC impedance and TGA. The morphological behavior and phase variation of membranes are explored using FE-SEM and AFM; the triblock (XYX) membranes exhibits a nano-phase separated morphology. Performance of PEFC integrated with blend and block copolymer membranes is determined at 60 °C under 60% RH. As a result, the triblock (XYX) membrane has a high power density than blend (2X1Y) membrane.

Preparation of a novel poly (ether ether ketone) self-reinforced paper appropriate for harsh conditions

2021 ◽  
Vol 56 (18) ◽  
pp. 11174-11185
Author(s):  
Xin Cong ◽  
Jiannan Ren ◽  
Chunhui Xiang ◽  
Xuzhao Gai ◽  
Guibin Wang ◽  
...  
Keyword(s):  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone ◽  
Harsh Conditions
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