Results 201 to 210 of about 31,614 (246)

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +1 more source

Synthesis and characterization of poly(ether ketone ether ketone ketone)/poly(ether ether ketone ketone) copolymers containing naphthalene and pendant cyano groups

Journal of Applied Polymer Science, 2009
Abstract2,6‐Bis(β‐naphthoxy)benzonitrile (BNOBN) was synthesized by reaction of β‐naphthol with 2,6‐difluorobenzonitrile in N‐methyl‐2‐pyrrolidone (NMP) in the presence of KOH and K2CO3. Poly(ether ketone ether ketone ketone)(PEKEKK) /poly(ether ether ketone ketone) (PEEKK) copolymers containing naphthalene and pendant cyano groups were obtained by ...
Mingzhong Cai, Meihua Zhu, Yikai Yu
openaire   +1 more source

Poly(ether ether ketone)s and poly(ether ether ketone ketone)s containing cardo decahydronaphthalene groups: Synthesis and characterization

Journal of Applied Polymer Science, 2011
AbstractNew poly(ether ether ketone)s and poly (ether ether ketone ketone)s were synthesized by polycondensation of each of the three bisphenols, viz., 4,4′‐(octahydro‐2(1H)‐naphthylidene)bisphenol, 4,4′‐(octahydro‐2(1H)‐naphthylidene)bis‐3‐methylphenol, and 4,4′‐(octahydro‐2(1H)‐naphthylidene)bis‐3,5‐dimethylphenol with 4,4′‐difluorobenzophenone and 1,
Pandurang N. Honkhambe, Sharad K. Pasale, Nagendra S. Bhairamadgi, Kishor P. Kumbhar, Manikrao M. Salunkhe, Prakash P. Wadgaonkar   +5 more
openaire   +1 more source

Poly(ether ether ketone)

2009
Abstract Major Applications General-purpose molding and extrusion polymer for high-performance applications, especially as resin for carbon fiber composites. Examples include chemical resistant tubing and electrical insulation, automotive bearings, pump and valve construction for corrosive applications, and compressor valve plates ...
openaire   +1 more source

Synthesis and structural properties of sulfonated poly ether ether ketone (SPEEK) and Poly ether ether ketone (PEEK)

AIP Conference Proceedings, 2020
Polyether ether ketone (PEEK) is one of the most important aromatic polymers; it has many applications in nanotechnology. The new sulfonated polyether ether ketone (sPEEK) membrane was successfully prepared, by using sulfonation processed for PEEK polymer; 10 grams of PEEK sample were dissolved progressively in 200 ml of sulfuric acid (H2SO4).
Salah M. S. Al-Mufti, Mawlood Maajal Ali, S. J. A. Rizvi   +2 more
openaire   +1 more source

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
openaire   +3 more sources

Conformational Characteristics of Poly-ether-ether-ketone and Poly-ether-nitrile

Japanese Journal of Applied Physics, 1995
Conformational analyses of poly-ether-ether-ketone (PEEK), poly-ether-nitrile (PEN) and their related polymers were performed using a semi-empirical molecular orbital method with the Austin Model 1 Hamiltonian (AM1 method in MOPAC). The minimum energy conformations were in good agreement with those in crystal structures of PEEK and PEN.
Shigenori Shirouzu, Masahiro Yoshida, Norio Senda   +2 more
openaire   +1 more source

A Study of Blends of Poly(ether ether ketone ketone) and Poly(ether sulphone): Effect of the Addition of Poly(ether ether ketone) Oligomer

Polymers and Polymer Composites, 1996
The thermal and viscoelastic behaviour and mechanical properties of blends of poly(ether ether ketone ketone) (PEEKK) with poly(ether sulphone) (PES) have been investigated. Additionally, poly(ether ether ketone) (PEEK) oligomer was added as the third component to the above blend in order to improve its compatibility and mechanical properties.
Mitsuhiro Shibata, Zhijie Fang, Ryutoku Yosomiya   +2 more
openaire   +1 more source