Results 171 to 180 of about 6,593 (202)
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Hierarchical Morphology of Poly(ether ether ketone) Aerogels
ACS Applied Materials & Interfaces, 2019The 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 +5 more
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Sulphonated poly(ether ether ketone): synthesis and characterisation
Macromolecular Symposia, 2004AbstractThe 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 +2 more
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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 +3 more
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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 +3 more
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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
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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
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Macromolecular Chemistry and Physics, 2000
A rare case of ternary polymer miscibility has been demonstrated in the mixture (in the glassy amorphous domains) comprising three polymers: polyetherimide (PEI), a new semicrystalline meta-linked poly(ether diphenyl ether ketone) (PFDEKm). and semicrystalline poly(ether ether ketone) (PEEK).
E. M. Woo, Yi-Chern Tseng
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A rare case of ternary polymer miscibility has been demonstrated in the mixture (in the glassy amorphous domains) comprising three polymers: polyetherimide (PEI), a new semicrystalline meta-linked poly(ether diphenyl ether ketone) (PFDEKm). and semicrystalline poly(ether ether ketone) (PEEK).
E. M. Woo, Yi-Chern Tseng
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Polymer Engineering & Science, 2016
A new monomer, 1,4‐bis(4‐phenoxybenzoyl)naphthalene (BPOBN), was conveniently synthesized via a simple synthetic procedure from readily available materials. A series of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether ketone ketone ether ketone ketone) containing 1,4‐naphthylene moieties were prepared by the Friedel‐Crafts ...
Xiujun Xie +3 more
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A new monomer, 1,4‐bis(4‐phenoxybenzoyl)naphthalene (BPOBN), was conveniently synthesized via a simple synthetic procedure from readily available materials. A series of novel copolymers of poly(ether ketone ether ketone ketone) and poly(ether ketone ketone ether ketone ketone) containing 1,4‐naphthylene moieties were prepared by the Friedel‐Crafts ...
Xiujun Xie +3 more
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Thermal stability of a novel poly(ether ether Ketone Ketone) (PK99)
Polymer Engineering & Science, 1996AbstractThe degradation of PK99 was studied by heating the polymer in both isothermal and dynamic conditions under nitrogen flow and in a static air atmosphere. In both environments this polymer's thermal stability exceeded that of PEEK. The dynamic experiments showed that in both nitrogen and air atmospheres the polymer degraded in two stages with ...
ABATE L. +3 more
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Properties of poly(ether ether ketone)
2015This chapter gives a brief account on preparation and processing methods of poly(ether ether ketone). It is a commonly used high-performance engineering thermoplastics. Important properties of poly(ether ether ketone) are also given.
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Thermal properties of melt‐blended poly(ether ether ketone) and poly(ether imide)
Journal of Applied Polymer Science, 1999The thermal properties of blends of poly(ether ether ketone) (PEEK) and poly(ether imide) (PEI) prepared by screw extrusion were investigated by differential scanning calorimetry. From the thermal analysis of amorphous PEEK–PEI blends which were obtained by quenching in liquid nitrogen, a single glass transition temperature (Tg) and negative excess ...
Yong Sung Chun +3 more
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2009
Abstract Type of Polymerization Nucleophilic displacement of activated aromatic halides in polar solvents by alkali metal phenates or Friedel–Crafts processes.
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Abstract Type of Polymerization Nucleophilic displacement of activated aromatic halides in polar solvents by alkali metal phenates or Friedel–Crafts processes.
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