Ether ketone PEK

Polyetherimide-polysiloxane multiblock copolymers, 24 716 Polyetherimides (PEI), 10 217—218 Polyether impression materials, 8 332-333 Poly(ether ketones) (PEK), 10 197-199 Polyether polyols, 25 455-456,464,468t, 470 propylene oxide polymerization to, 20 793-794, 812 Poly ethers, 12 663... 

Triethoxysilane-capped poly(arylene ether ketone), PEK, or poly(arylene ether sulfone), PSF... 

Different TPs have been used to modify thermosets, such as poly(ether sulfone) (PES), polysulfone (PSF), poly(ether ketone) (PEK), polyether imide (PEI), poly(phenylene oxide) (PPO), linear polyimides, polyhydan-toin, etc. (Stenzenberger et al., 1988 Pascal et al., 1990, 1995 Pascault and Williams, 2000). 

Within the past several years, improvements in the toughening of high-temperature epoxies and other reactive thermosets, such as cyanate esters and bismaleimides, have been accomplished through the incorporation of engineering thermoplastics. Additions of poly(arylene ether ketone), PEK, and poly(aryl ether sulfone), PES, have been found to improve fracture toughness. Direct addition of these thermoplastics generally improves fracture toughness but results in decreased tensile properties and reduced chemical resistance. 

Poly(ether ketone) (PEK) 1 is a crystalline high-performance aromatic polymer. It can be prepared in solution from the condensation of 4,4 -dihydroxybenzophenone with 4,4 -difluorobenzophenone, in the presence of anhydrous potassium carbonate, using diphenylsulfone as solvent at... 

Similarly, a chemically amplified photosensitive poly(phenylene ether ketone) (PEK) based on ketal-protected PEK as a precursor polymer has been produced [62]. 

Saito Y, Matsumoto K, Higashihara T, Ueda M. A chemically amphfied, negative-type photosensitive polyCphenylene ether ketone) (PEK) resist based on ketal-protected PEK and a photoacid generator. Chem Lett 2009 38(11) 1048-9. 

PEEK, poly(atyl ether ether ketone) PEK, bisphenol-A polyetherketone TMBPA-PEK, tetramethylbisphenol-A PEK BPZ-PEK, PEK from cyclohexylidene TMC-PEZ, PEK from trimethyl-cyclohexylidene PEK. 

Other engineering thermoplastics have also been examined and found to be effective e.g., polyetherimide [121-124], poly(ether ketones) (PEK) [125,126], poly(phenylene oxide) [127-129], and liquid crystalline polymers [130, 131]. 

Poly (ether ketone) (PEK) 79, 80, 112, 175 Poly(ether sulfone) 79 Poly(a,e-L-lyslne) 53 Poly(oiganophosphazenes) 27, 28, 37 Poly(p-phenylene), linear 30, 32, 33, 46-48, 116, 153, 166, 185 networks 48-50,52-53,116-117 Poly(p-phenylene terephthalamide) (p-PT) 30, 168, 170-172 Poly(phenylquinoxaline) 103-105 Poly(thio ether ketone) 79, 80 Principle of equal reactivity, invalidity 128, 132... 

The commercial cardo poly(ether ketones) (PEK-C) were selected by Liu et al. to prepare AEMs by usual three-step postmodilication method (Figure 11.8). The final membranes showed ionic conductivity varied from 1.6 to 5.1 mS/cm over the temperature range of 20°C-60°C. Although its ionic conductivity was quite lower compared with other PEEK-based AEMs, the methanol permeability was less than 10" cm% at 30°C in 4 M methanol solutions. Except this way, Zhang and colleagues successfully introduced benzyl chloromethyl groups to the PEK-C matrix via plasma graft polymerization. This approach enables a well preservation in the structure of... 

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