Results 211 to 220 of about 31,941 (245)

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

Effect of dihydroxydiphenyl ether on poly(ether ether ketone)

Journal of Polymer Research, 1996
A series of modified poly(ether ether ketone) (PEEK) polymers were synthesized by introduction of addition ether groups from dihydroxydiphenyl ether (DHDE) into the PEEK structure. The inherent viscosity of the DHDE-modified PEEK increased with reaction time at 320 °C.
K. H. Hsieh, Y. C. Chern, K. S. Hoe, Y. Z. Wang, B. W. Chan, L. W. Chen   +5 more
openaire   +1 more source

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

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

Influence of lubricant on the properties of poly(ether ether ketone) and poly(ether ether ketone)/carbon fiber composites

Macromolecular Research, 2010
An improvement in the processability of poly(ether ether ketone) (PEEK) and PEEK/carbon fiber (PEEK/CF) composites with less influence on the other properties is important. A novel high temperature lubricant, GENIOPLAST PELLETS (GPPS), was used to decrease the melt viscosity of PEEK and PEEK/CF composites.
Shuling Zhang, Jianxin Mu, Dianfu Ren, Fugui Zhou, Zhenhua Jiang, Zhongwen Wu, Guibin Wang   +6 more
openaire   +1 more source

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

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 ...
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Synthesis and properties of novel random copolymers of poly(ether ketone ether ketone ketone)–poly(ether ketone imide)

Journal of Polymer Research, 2013
Bis[4-(p-phenoxybenzoyl)-1,2-benzenedioyl]-N,N,N',N'-4,4'-diaminodiphenyl ether (BPBDADPE) was prepared by the Friedel-Crafts acylation reaction of diphenyl ether (DPE) with bis(4-chloroformyl-1,2-benzenedioyl)-N,N,N',N'-4,4'-diaminodiphenyl ether (BCBDADPE).
Bin Huang, Yongfeng Sun, Guixia Wang, Mingzhong Cai   +3 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