Effect of annealing on the viscoelastic behavior of poly(ether-ether-ketone)

Jiang, Zhiyuan; Liu, Peng; Sue, Hung‐Jue; Bremner, Tim

doi:10.1016/j.polymer.2018.11.052

Cited by 39 publications

(31 citation statements)

References 28 publications

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“…The degrees of crystallinity calculated from heating scans and normalized by the weight fraction of PEEK or PEKK are reported and the heating scans are also presented in Figure . The P‐C PEEK/PBI appears to have the highest degree of crystallinity, 41.2%, which is almost the same as that of the neat Victrex PEEK 150G reported in our previous work . This suggests that the crystallization of PEEK matrix is not significantly affected by the dispersed PBI particles in P‐C PEEK/PBI even though PBI accounts for 50% by weight.…”

Section: Resultssupporting

confidence: 82%

“…Specimens with a mass of around 6 mg were prepared and DSC measurements were conducted at a ramping rate of 20 °C/min from 100 to 400 °C in N 2 purge protection. The ratio of enthalpy of fusion of specimen, integral of the heating thermal curve, to that of an ideal 100% crystalline PEEK or PEKK, which is 130 J/g, is used for the calculation of the degree of crystallinity …”

Section: Methodsmentioning

confidence: 99%

“…Poly(aryl‐ether‐ketone) (PAEK) is a family of high‐performance polymers well known for their excellent mechanical properties, chemical resistance, and thermal stability. PAEK polymers are used in high temperature and high pressure (HTHP) corrosive environments while maintaining acceptable mechanical integrity . Polybenzimidazole (PBI) is a high‐performance amorphous polymer possessing a high glass‐transition temperature ( T g ) of 436 °C .…”

Section: Introductionmentioning

confidence: 99%

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The influence of processing conditions on the mechanical properties of poly(aryl‐ether‐ketone)/polybenzimidazole blends

Jiang

Liu

Chen

et al. 2020

J of Applied Polymer Sci

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Interest in developing high-performance blends for niche applications has grown significantly in efforts to meet everincreasing harsh environment demands. In this work, four model poly(aryl-ether-ketone)/polybenzimidazole (PAEK/PBI) blends were chosen to study the influence of premixing methods, processing, and matrix polymers, on their mechanical properties. Among the model poly(ether ether ketone) (PEEK) and PBI blends, mechanical properties are greatly enhanced by melt premixing. The molding process mainly affects the matrix crystallinity, which in turn greatly influences fracture toughness of the blend. Poly(ether ketone ketone) (PEKK) and PBI blend exhibits a slightly lower tensile strength and fracture toughness than PEEK/PBI due to the differences in inherent properties of PEEK and PEKK matrices and their interfacial interaction with PBI. The processing−structure-property relationship of PAEK/PBI blends is established to help guide optimal design of high-performance polymer blends for structural applications.

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Section: Resultssupporting

confidence: 82%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The influence of processing conditions on the mechanical properties of poly(aryl‐ether‐ketone)/polybenzimidazole blends

Jiang

Liu

Chen

et al. 2020

J of Applied Polymer Sci

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“…It is worth noting that these activation energies differ pronouncedly from the activation energies for

-relaxation reported in previous studies on the time-dependent response of PEEK (

[ 38 ],

[ 37 ]

[ 61 ],

to 1000 [ 9 ],

[ 39 ], and

kJ/mol [ 62 ]). To explain this difference, experimental data in relaxation tests are treated by the conventional method: all relaxation curves at elevated temperatures T are shifted horizontally (along the time-axis) to construct a master-curve at room temperature

.…”

Section: Resultscontrasting

confidence: 71%

“…Observations in nanoindentation tests are discussed in [ 34 , 35 ]. Experimental data in relaxation tests are reported in [ 11 , 36 , 37 ], and those in creep tests are presented in [ 11 , 38 , 39 , 40 ].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Mechanical Behavior of Poly(ether ether ketone): Experiments and Modeling

Drozdov

Christiansen

2021

Polymers

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Observations are reported on poly(ether ether ketone) (PEEK) in uniaxial tensile tests, relaxation tests and creep tests with various stresses in a wide interval of temperatures ranging from room temperature to 180 °C. Constitutive equations are developed for the thermo–mechanical behavior of PEEK under uniaxial deformation. Adjustable parameters in the governing equations are found by matching the experimental data. Good agreement is demonstrated between the observations and results of numerical simulation. It is shown that the activation energies for the elastoplastic, viscoelastic and viscoelastoplastic responses adopt similar values at temperatures above the glass transition point.

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Rheological and crystallization behaviors of low processing temperature poly(aryl ether ketone)

Bonmatin

Chabert

Bernhart

et al. 2021

J of Applied Polymer Sci

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A new low melting temperature poly(aryl ether ketone) (PAEK) thermoplastic polymer (Victrex AE 250) was investigated through thermal and rheological analysis of films and flakes. DSC was assigned to evaluate the influence of cooling rate on crystallinity and thermal transitions. Rheometry was used to assess its flowing behavior through the evaluation of dynamic moduli and complex viscosity in the melted state. The relaxation times were found from the rheological curves: they are between a few ms to 200 ms for AE 250, lower than those found for PEEK 450, meaning a faster mobility of macromolecules.The thermal activation energy, E a obtained from Time Temperature Superposition is the same for films and flakes in spite of a lower viscosity for flakes. The molecular weight between entanglements is evaluated at 8000 g.mol À1 for FMc and 13,000 for FLc, it is compared to the value of about 2000 g.mol À1found for PEEK 450 with the same procedure. Also, the viscosity was compared to other commercial PAEK such as PEEK and PEKK based on data from the literature. This polymer appears very efficient to compete with high performance thermoplastics to be processed by compression molding, out of autoclave consolidation, additive manufacturing, and welding.

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Effect of annealing on the viscoelastic behavior of poly(ether-ether-ketone)

Cited by 39 publications

References 28 publications

The influence of processing conditions on the mechanical properties of poly(aryl‐ether‐ketone)/polybenzimidazole blends

The influence of processing conditions on the mechanical properties of poly(aryl‐ether‐ketone)/polybenzimidazole blends

Thermo-Mechanical Behavior of Poly(ether ether ketone): Experiments and Modeling

Rheological and crystallization behaviors of low processing temperature poly(aryl ether ketone)

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