Results 191 to 200 of about 31,614 (246)

Structural study on poly(ether ether ketone ketone)‐poly(ether biphenyl ether ketone ketone) copolymers

Macromolecular Rapid Communications, 1996
AbstractStructures of poly(ether ether ketone ketone)‐poly(ether biphenyl ether ketone ketone) copolymers were studied by using small angle X‐ray scattering and the one‐dimensional electron density correlation function method. The results revealed that structures of the aggregated state of the copolymers depend closely on the biphenyl content (nb ...
Hongfang Zhang, Baoquan Yang, Zhishen Mo, Hui Na, Zhongwen Wu   +4 more
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Thermoreversible Gelation of Poly(ether ether ketone)

ACS Macro Letters, 2017
Solutions of poly(ether ether ketone) in dichloroacetic acid have been shown to form monolithic, thermoreversible gels at temperatures ranging from 10 to 140 °C. A phase diagram was constructed over broad concentration and temperature ranges, and the phase boundary suggests an upper critical solution temperature (UCST) behavior. Furthermore, poly(ether
Samantha J. Talley, Xijing Yuan, Robert B. Moore   +2 more
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Anomalous diffusion in poly-ether-ether-ketone

Chemical Engineering Science, 1994
Poly-ether-ether-ketone (PEEK) is a thermoplastic tough polymer used as a matrix for advanced composite materials in aeronautic applications. The investigation of its resistance to humid environment and to exposure to organic and chlorinated solvents is extremely important.
M. A. Del Nobile, MENSITIERI, GIUSEPPE, NETTI, PAOLO ANTONIO, L. Nicolais   +3 more
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Synthesis and properties of novel copolymers of poly(ether ketone diphenyl ketone ether ketone ketone) and poly(ether amide ether amide ether ketone ketone)

Polymer Engineering & Science, 2013
New monomers, 4,4′‐bis(4‐phenoxybenzoyl)diphenyl (BPOBDP) and N,N′‐bis(4‐phenoxybenzoyl)−4,4′‐diaminodiphenyl ether (BPBDAE), were conveniently synthesized via simple synthetic procedures from readily available materials. Novel copolymers of poly(ether ketone diphenyl ketone ether ketone ketone) (PEKDKEKK) and poly(ether amide ether amide ether ketone ...
Bin Huang, Jiangping Qian, Guixia Wang, Mingzhong Cai   +3 more
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Synthesis and properties of poly(ether ether ketone ketone)‐poly(ether sulfone) block copolymers

Journal of Applied Polymer Science, 1996
Poly(ether ether ketone ketone)-poly(ether sulfone) (PEEKK/PES) block copolymers were prepared from the corresponding oligomers via a nucleophilic aromatic substitution reaction, and the M n of the PEEKK segment was fixed at 12,000, while the M n 's of the PES segment ranged from 250 to 12,680.
Junkui Cao, Junzuo Wang, Yan Chen, Zhongwen Wu   +3 more
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Synthesis and properties of copolymers of poly(ether ketone ketone) and poly(ether amide ether amide ether ketone ketone)

Polymer International, 2010
AbstractPoly(aryl ether ketone)s (PAEKs) are a class of high‐performance engineering thermoplastics known for their excellent combination of chemical, physical and mechanical properties, and the synthesis of semicrystalline PAEKs with increased glass transition temperatures (Tg) is of much interest. In the work reported, a series of novel copolymers of
Jianwen Jiang, Nengwen Ding, Mingzhong Cai   +2 more
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Blends of Poly(ether ether ketone ketone) and Poly(p-phenyiene sulphide): Addition of Poly(ether ether ketone) Oligomer

Polymers and Polymer Composites, 1999
The effect on compatibility of the addition of poly(ether ether ketone) (PEEK) oligomer to poly(ether ether ketone ketone) (PEEKK)/polv(p-phenylene sulphide) (PPS) blends has been investigated. Viscoelastic measurements and differential scanning calorimetry (DSC) of PEEKK/PPS blends show that the blends are completely immiscible over the whole ...
Zhijie Fang, Mitsuhiro Shibata, Shigeyuki Takahashi, Ryutoku Yosomiya   +3 more
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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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Evaluation of process parameters for poly(ether ether ketone) to poly(ether ether ketone) friction welded joint

Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 2021
Poly(ether ether ketone) is a semicrystalline organic polymer. It has widely been used as high-performance engineering plastic owing to its high melting point (343 °C), excellent mechanical strength, and outstanding chemical resistance. Therefore, poly(ether ether ketone) and its composites have shown lots of applications in aerospace and medical ...
Sangli Senkathir, Sumit Pramanik, Manidipto Mukherjee   +2 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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