Results 191 to 200 of about 13,229 (248)

Trifluoromethylated poly(ether ether ketone)s

Polymer, 1994
Abstract Novel copolymers of poly(ether ether ketone) containing ring trifluoromethyl groups have been synthesized by starting with trifluorobenzophenone monomers. Unlike poly(ether sulfone) analogues, it is possible to prepare copolymers which contain CF 3 groups ortho to the ether bridges.
James H. Clark, James E. Denness
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Rheological properties of phenophthalein poly(ether ether ketone)

Polymer Engineering & Science, 1996
AbstractThe rheological properties of the novel engineering thermoplastic phenophthalein poly(ether ether ketone) (PEK‐C) have been investigated using both a rotational and a capillary rheometer. The dependence of the viscosity on the shear rate and temperature was obtained.
NOBILE, Maria Rossella, Yingewi Di, Domenico Acierno, Binyao Li   +3 more
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Fine poly(ether ether ketone) powders

Journal of Applied Polymer Science, 1997
The physical form of polymers is often important for carrying out subsequent processing operations. For example, fine powders are desirable for molding and sintering compounds because they consolidate to produce void free components. The objective of this work is to prepare fine polymeric particulates suitable for processing into fiber reinforced ...
J. V. Facinelli, A. E. Brink, S. Liu, H. Li, S. L. Gardner, R. M. Davis, J. S. Riffle, M. Marrocco, S. Harding   +8 more
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Hierarchical Morphology of Poly(ether ether ketone) Aerogels

ACS Applied Materials & Interfaces, 2019
The phase diagram for the thermoreversible gelation of poly(ether ether ketone) (PEEK) in 4-chlorophenol (4CP) was constructed over broad temperature and concentration ranges, revealing that PEEK is capable of dissolving and forming gels in both 4CP and dichloroacetic acid (DCA) up to a concentration of 25 wt %.
Samantha J. Talley, Stephanie L. Vivod, Baochau A. Nguyen, Mary Ann B. Meador, Aurel Radulescu, Robert B. Moore   +5 more
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Sulphonated poly(ether ether ketone): synthesis and characterisation

Macromolecular Symposia, 2004
AbstractThe paper describes the sulphonation of commercially available poly(ether ether ketone) PEEK (GATONETM, Gharda Chemicals Limited, India and VICTREX®, ICI Limited, UK) by using concentrated sulphuric acid. The concentration of GATONE in conc. H2SO4 was varied from 4‐10% (w/v) whereas in VICTREX® the concentration was 4% (w/v).
R. T. S. Muthu Lakshmi, V. Choudhary, I. K. Varma   +2 more
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Low‐Permeability Poly(ether Ether Ketone)‐Based Ampholytic Membranes

ChemPlusChem, 2016
AbstractIon‐exchange membranes based on sulfonated and sulfaminated poly(ether ether ketone) were prepared by a modified sulfamination route. In a first step, poly(ether ether ketone) was sulfonated. The sulfonic acid groups were then transformed into chlorosulfonic moieties by reaction with thionyl chloride.
NARDUCCI, RICCARDO, PASQUINI, LUCA, Chailan, J, Knauth, P, DI VONA, MARIA LUISA   +4 more
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Surface Plasticization of Poly(ether ether ketone)

European Polymer Journal, 2011
Abstract This paper describes a study of the surface plasticization and antiplasticization of an amorphous and a semicrystalline poly(ether ether ketone) (PEEK) in solvent environments using nanohardness method. A range of solvents (octane, chloroform, tetrachloroethane, acetone, dichlorobenzene, polyethyleneglycol (PEG), methanol and water) based on
T. Iqbal, B.J. Briscoe, P.F. Luckham
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The crystallinity of poly(ether ether ketone)

Polymer, 1992
Abstract Differences have been observed between the enthalpies of crystallization and fusion of quenched ‘amorphous’ poly(ether ether ketone) (PEEK) which have been attributed to residual crystallinity produced during quenching. Comparison with samples of PEEK crystallized under well defined conditions reveals that these apparent differences arise ...
A.A. Mehmet-Alkan, J.N. Hay
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Solution crystallization of poly(ether ether ketone)

Macromolecules, 1986
Morphologie des spherulites et des monocristaux obtenus a partir de solutions dans l'α-chloronaphtalene et la ...
Andrew J. Lovinger, D. D. Davis
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Surface modifications of poly(ether ether ketone)

Macromolecules, 1991
Etude par spectroscopies XPS et ATR IR de la modification de films de poly(ether ether cetone) amorphes, semicristallins et cristallins par des reactifs selectifs des groupes carbonyl (hydrazine, hydroxylamine, phosphorane, hydrure d'aluminium, cyanure de trimethylsilyle, etc...)
Nicole L. Franchina, Thomas J. McCarthy
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