In situ determination of mechanical properties for poly(ether ether ketone) film under extreme conditions

Wang, Jiayu; Zhou, Qiang; Chao, Danming; Li, Fangfei; Cui, Tian

doi:10.1039/c6ra27657a

Cited by 10 publications

(7 citation statements)

References 34 publications

(42 reference statements)

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“…Semicrystalline aromatic poly(ether ketone)s represent an industrially important class of high-performance thermoplastics with outstanding physicochemical properties . For example, PEEK (Chart ) is widely used in situations that require mechanical strength at very high temperatures, or in chemically aggressive environments, or in applications such as medical implants and prostheses which exploit its inert character and biocompatibility . It also finds increasing application as a thermoplastic matrix in high-performance carbon fiber composites …”

Section: Introductionmentioning

confidence: 99%

Trifluoromethylation of Carbonyl Groups in Aromatic Poly(ether ketone)s: Formation of Strongly Polar yet Surface-Hydrophobic Poly(arylenenecarbinol)s

et al. 2018

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Fluoride-catalyzed reactions of trimethyl(trifluoromethyl)silane with a range of aromatic poly(ether ketone)s, both amorphous and semi-crystalline, proceed quantitatively in THF to yield soluble, amorphous polymers in which the carbon-silicon bond of CF3SiMe3 has added across the carbonyl-oxygen double bond of each carbonyl group. When the starting poly(ether ketone) is amorphous and soluble in THF the reaction is fairly rapid (hours), but is much slower (days) when the starting polymer is semi-crystalline, with only low solubility in THF. Quantitative desilylation of the resulting polymers is achieved by reaction with excess fluoride ion, affording poly(arylene-trifluoromethylcarbinol)s. These extremely polar polymers are readily soluble in protic solvents such as methanol or ethanol, to give solutions from which tough, coherent films may be cast by evaporation in air. Despite the evidently high polarity of the bulk polymers, the surfaces of cast films are relatively hydrophobic, with static water contact angles of ~ 90°. Surface analyses by XPS are consistent with enrichment of the polymer-air interface in CF3 groups.

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Section: Introductionmentioning

confidence: 99%

Trifluoromethylation of Carbonyl Groups in Aromatic Poly(ether ketone)s: Formation of Strongly Polar yet Surface-Hydrophobic Poly(arylenenecarbinol)s

et al. 2018

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“…The connection between the frequency shift of ϑ of Brillouin peaks and the phase velocity V of the corresponding acoustic mode directly derived as follows [ 47 , 48 ]:

where ϑ L is the longitudinal acoustic phonon frequency deduced from the Brillouin peak frequency shift; λ i is the incident light wavelength and n is the refractive index of the material.…”

Section: Resultsmentioning

confidence: 99%

Mechano-Chemical Properties of Electron Beam Irradiated Polyetheretherketone

et al. 2022

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In this study, the mechano-chemical properties of aromatic polymer polyetheretherketone (PEEK) samples, irradiated by high energy electrons at 200 and 400 kGy doses, were investigated by Nanoindentation, Brillouin light scattering spectroscopy and Fourier-transform infrared spectroscopy (FTIR). Irradiating electrons penetrated down to a 5 mm depth inside the polymer, as shown numerically by the monte CArlo SImulation of electroN trajectory in sOlids (CASINO) method. The irradiation of PEEK samples at 200 kGy caused the enhancement of surface roughness by almost threefold. However, an increase in the irradiation dose to 400 kGy led to a decrease in the surface roughness of the sample. Most likely, this was due to the processes of erosion and melting of the sample surface induced by high dosage irradiation. It was found that electron irradiation led to a decrease of the elastic constant C11, as well as a slight decrease in the sample’s hardness, while the Young’s elastic modulus decrease was more noticeable. An intrinsic bulk property of PEEK is less radiation resistance than at its surface. The proportionality constant of Young’s modulus to indentation hardness for the pristine and irradiated samples were 0.039 and 0.038, respectively. In addition, a quasi-linear relationship between hardness and Young’s modulus was observed. The degradation of the polymer’s mechanical properties was attributed to electron irradiation-induced processes involving scission of macromolecular chains.

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“…Poly(aryl ether ketone)s (PAEKs) are a class of semicrystalline, high‐performance engineering thermoplastics possessing excellent physicochemical and mechanical properties 1–4 . They are currently receiving much attention for wide‐ranging applications in aerospace, electronics, automobile, biomedicine and other high‐tech fields 5–10 . The synthesis of PAEKs can be carried out through two main routes 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and properties of novel poly(ether ketone ketone)s containing 1,4‐naphthylene units by electrophilic solution copolycondensation

Wang

Cai

2021

Polymer International

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Semicrystalline poly(aryl ether ketone)s (PAEKs) represent an industrially important class of high‐performance engineering thermoplastics with excellent physicochemical and mechanical properties, and the synthesis of PAEKs with enhanced glass transition temperatures (Tg) and moderate melting temperatures (Tm) is highly desirable. In the work reported, novel poly(ether ketone ketone)s (PEKKs) containing 1,4‐naphthylene units in main chains were synthesized by Friedel–Crafts solution copolycondensation of terephthaloyl chloride with a mixture of diphenyl ether and 1,4‐di(4‐phenoxybenzoyl)naphthalene (1,4‐DPOBN). The polymerization proceeded smoothly in 1,2‐dichloroethane in the presence of anhydrous AlCl3 and N‐methylpyrrolidone under mild conditions and afforded polymers having inherent viscosities of 0.66–0.98 dL g−1. The polymers with 5–30 mol% 1,4‐DPOBN are semicrystalline and have obviously enhanced Tg over commercial poly(ether ether ketone)s and PEKKs due to the incorporation of rigid and bulky 1,4‐naphthylene moieties into the main chain. The polymers with 20–30 mol% 1,4‐DPOBN not only have high Tg of 175–177 °C, but also relatively low Tm of 331–336 °C, having high potential for melt processing. The polymers with 20–30 mol% 1,4‐DPOBN also exhibit excellent thermal stability and good mechanical and solvent‐resistance properties. © 2021 Society of Chemical Industry

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In situ determination of mechanical properties for poly(ether ether ketone) film under extreme conditions

Abstract: The isothermal compressibility and pressure dependence of mechanical moduli of PEEK film under extreme conditions have been examined and determined.

Cited by 10 publications

References 34 publications

Trifluoromethylation of Carbonyl Groups in Aromatic Poly(ether ketone)s: Formation of Strongly Polar yet Surface-Hydrophobic Poly(arylenenecarbinol)s

Trifluoromethylation of Carbonyl Groups in Aromatic Poly(ether ketone)s: Formation of Strongly Polar yet Surface-Hydrophobic Poly(arylenenecarbinol)s

Mechano-Chemical Properties of Electron Beam Irradiated Polyetheretherketone

Synthesis and properties of novel poly(ether ketone ketone)s containing 1,4‐naphthylene units by electrophilic solution copolycondensation

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