Fine polymeric powders from poly(aryleneether ketone)s

Brink, A. E.; Gutzeit, S.; Lin, Tiantian; Marand, Herve; Lyon, K.R.; Tian, Huayu; Davis, Richey M.; Riffle, Judy S.

doi:10.1016/0032-3861(93)90369-l

Cited by 22 publications

(22 citation statements)

References 3 publications

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“…The chemical shifts of PASK/SB100 are listed in Table 2. Figure 3 shows the 13 Figure 1 shows the FT-IR spectrum of H-PASK/SB100. It confirmed the hydrolysis of PASK/SB100 for the appearance of -CO-stretching peak at 1653 cm −1 , and the FT-IR spectrum of H-PASK/SB100 was almost accordant with PASK/SB0's.…”

Section: Chain Structure Of Copolymersmentioning

confidence: 99%

“…DFBI was prepared according to the method reported in earlier reference [13] , and the synthesis route is shown in Scheme 1. A typical procedure was given as following: 261.1 g DFBP (1.20 mol), 164 mL aniline (1.80 mol) and 1500 mL toluene were charged together with 0.20 g toluenesulfonic acid into a three-necked round-bottom flask equipped with an oil-and-moisture trap with condenser, a N 2 inlet and a thermoregulated electrical heating mantle.…”

Section: Monomermentioning

confidence: 99%

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Synthesis and characterization of poly(p-arylene sulfide ketone/Schiff base) copolymers

Wang

Zhang

et al. 2012

Chin J Polym Sci

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Poly(p-arylene sulfide ketone/Schiff base) copolymers (PASK/SB) were prepared by solution polycondensation of 4,4′-diflurobenzophenone (DFBP) and N-phenyl(4,4′-diflurodiphenyl) ketimine (DFBI) with sodium sulfide in the presence of sodium hydroxide under normal pressure. Elemental analyses, FT-IR, NMR, DSC, TGA and XRD were used to characterize the resultant copolymers. It was found that the copolymers had good thermal properties with glass transition temperature (T g ) of 155.0−172.0°C, melting temperature (T m ) of 298−344°C, 5% weight loss temperatures (T d ) of 471.0−501.5°C. These copolymers were almost amorphous with the content of DFBI beyond 30%. The polymer with 100% DFBI had excellent solubility, and it could dissolve in some solvents such as tetrahydrofuran (THF) and N-methyl-2-pyrrolidone (NMP). The processability of polymers was improved. Meantime the viscosity of PASK made from hydrolysis of PASK/SB (H-PASK/SB) was greatly improved from 0.135 dL/g to 0.605 dL/g.

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Section: Chain Structure Of Copolymersmentioning

confidence: 99%

Section: Monomermentioning

confidence: 99%

Synthesis and characterization of poly(p-arylene sulfide ketone/Schiff base) copolymers

Wang

Zhang

et al. 2012

Chin J Polym Sci

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“…Brink et al 5 have reported a process for preparing submicron diameter PEEK particles by rapidly hydrolyzing a soluble precursor polymer, poly(ether ether ketimine) to PEEK. The polymer rapidly nucleated and crystallized from the supersaturated PEEK solutions in the form of small particles.…”

Section: Introductionmentioning

confidence: 99%

Morphological and structural development of poly(ether ether ketone) during mechanical pulverization

Liang

Huang

et al. 2007

J of Applied Polymer Sci

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Micron size particles of poly(ether ether ketone) (PEEK) were prepared by self-made pan-type milling equipment operated at ambient temperature. The changes of particle morphology, crystalline properties, thermal behavior, and viscosity-average molecular mass during milling were studied by SEM, WAXD, DSC, TGA, and viscosimetry analyses, respectively. SEM analysis indicated that pan-milling firstly destroyed the original structure of PEEK through squeezing in-between mill pans, then to produce fine powder undergoing the processes of deforming and size reduction. The average particle size of PEEK was reduced to 100 lm only after 5 cycles of pan-milling and reached less than 50 lm after 50 cycles. DSC analysis showed that crystallinity of PEEK decreased with the panmilling cycles, agreed with WAXD data. The crystallinity of PEEK decreased from 46.2 to 39.9% of 50 pan-milling cycles was offered. The glass transition temperature increased slightly along with pan-milling cycles. Mechanochemical effects caused by pan-milling were also studied. Viscometer test exhibited that molecular weight dropped quickly at earlier pan-milling stage then decreased slightly during later pan-milling. Pan-milling technique is an efficient, clean, and environmental friendly method for preparing fine PEEK powder.

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“…Another possible method is that preparing an amorphous polymer precursor at a lower temperature firstly and then carrying out a simple reaction to obtain the desired crystalline polymer. N -phenyl (4,4′-difluorodiphenyl) ketimine is determined to be a monomer in the synthetic route of amorphous polymer precursors. ,− The synthesis of the polymer using ketimine instead of benzophenone not only can lower the reaction temperature but also can avoid the formation of the crystalline structure. The amorphous polymer precursor synthesized by ketimine can be hydrolyzed in an acidic environment to obtain a sulfonated polymer containing a crystalline hydrophobic backbone.…”

Section: Introductionmentioning

confidence: 99%

High Dimensional Stability and Alcohol Resistance Aromatic Poly(aryl ether ketone) Polyelectrolyte Membrane Synthesis and Characterization

Liu

Xie

et al. 2019

ACS Appl. Energy Mater.

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Crystallized sulfonated poly(arylene ether ketone) (Cr-SPAEK) materials constructed from dense sulfonated hydrophilic segments and crystalline poly(ether ketone) (PEK) hydrophobic backbone were designed. The membrane exhibited considerable proton conductivity and superb solvent resistance owing to its special phase morphology, the presence of a broad hydrophilic ion transport channel, and a crystalline hydrophobic matrix. The dense sulfonated hydrophilic segment provides excellent proton conductivity; the Cr-SPAEK-20 membrane exhibits higher proton-conducting ability than Nafion 117 in the temperature range of 20–100 °C; its proton conductivity reaches about 168 mS cm–1 at 100 °C. The crystalline PEK hydrophobic segment ensures superior solvent resistance and dimensional stability, guaranteeing the durability of the membrane in practical applications. The methanol permeability of Cr-SPAEK-20 is only one-eighth that of Nafion 117 when the test conditions are the same. The direct methanol fuel cell (DMFC), which is assembled by Cr-SPAEK-20, exhibited satisfactory open circuit voltage and maximum power density during the testing process. The Cr-SPAEK membranes have shown potential for DMFCs as polymer electrolyte materials.

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Fine polymeric powders from poly(aryleneether ketone)s

Cited by 22 publications

References 3 publications

Synthesis and characterization of poly(p-arylene sulfide ketone/Schiff base) copolymers

Synthesis and characterization of poly(p-arylene sulfide ketone/Schiff base) copolymers

Morphological and structural development of poly(ether ether ketone) during mechanical pulverization

High Dimensional Stability and Alcohol Resistance Aromatic Poly(aryl ether ketone) Polyelectrolyte Membrane Synthesis and Characterization

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