Study of the thermal properties of miscible blends between poly(ether ketone ketone) (PEKK) and polyimide

Domínguez, Sergio E.; Dérail, Christophe; Léonardi, Frédéric; Pascal, Jennifer; Brûlé, B

doi:10.1016/j.eurpolymj.2014.10.024

Cited by 10 publications

(12 citation statements)

References 18 publications

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“…Moreover, two distinct glass transitions are observed for blends that contain more than 30 wt % PEI, revealing that the composition of the amorphous phase is no longer homogeneous in crystallized blends. Splitting of the glass transition in crystallized PEKK/PEI blends has already been observed by Dominguez et al This suggests the coexistence of at least two different amorphous phases.…”

Section: Resultsmentioning

confidence: 99%

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Confinement and Distribution of the Composition in Semicrystalline/Amorphous Miscible Blends of PEKK/PEI: A Calorimetry Study

Belguise

Cantournet

Fabre³

et al. 2021

Macromolecules

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By combining small-angle X-ray scattering and differential scanning calorimetry measurements, we analyze the widening of the glass transition measured for miscible mixtures of semicrystalline PEKK chains and fully amorphous PEI chains. The calorimetric analysis reveals that the amorphous interlamellar phase is subject to confinement effects. In addition, we measure wide composition distributions for the amorphous interlamellar and interfibrillar phases. We quantitatively identify, through careful analysis of the signals, the fraction and average composition of each amorphous phase and the composition distribution. We conclude that the final distribution of the polymer chains that do not crystallize in the interlamellar and interfibrillar phases results from the crystallization dynamics of the mixtures.

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Section: Resultsmentioning

confidence: 99%

“…Moreover, each amorphous phase itself may be heterogeneous. Distribution of the composition has been observed in the amorphous phases of crystallized blends , and, in particular, in the system of interest here, polyetherketoneketone (PEKK)/polyetherimide (PEI) miscible blends …”

Section: Introductionmentioning

confidence: 99%

Confinement and Distribution of the Composition in Semicrystalline/Amorphous Miscible Blends of PEKK/PEI: A Calorimetry Study

Belguise

Cantournet

Fabre³

et al. 2021

Macromolecules

View full text Add to dashboard Cite

show abstract

“…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%

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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“…PEEK and PEI, a semi-crystalline and an amorphous polymer, respectively, have been widely studied as they form miscible blends in the amorphous state for all proportions. 62–64 While PEEK exhibits an excellent chemical resistance and high mechanical properties. It has a glass transition temperature of only 145°C.…”

Section: Polyether Imide (Pei)mentioning

confidence: 99%

An overview on the influence of process parameters through the characteristic of 3D-printed PEEK and PEI parts

Magri

Vanaei

Vaudreuil

2021

High Performance Polymers

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Fused Filament Fabrication (FFF) technology is increasingly applied in automotive, aerospace and medical applications. FFF is one of the most widely used additive manufacturing techniques to manufacture thermoplastics or their composites. FFF enables improvement in both cycle time and total cost of product development. Such improvements are achieved through the quick manufacture of functional prototypes enable real-world product development and testing. While the benefits of FFF are undeniable, its use in demanding applications is hindered by materials properties. The used commodity and standard polymers actually exhibit low to medium thermal and mechanical properties. To overcome this limitation, the aerospace industry looks for high-performance thermoplastics to obtain plastic parts strong enough to be used as a replacement for metal. Recent developments in FFF equipment now enable engineering polymers, such as Polyether ether ketone (PEEK) and Polyether imide (PEI), to be utilized for parts with increased mechanical and thermal properties. Thus, this article reviews and discusses the properties and the printing parameters of PEEK and PEI produced by FFF.

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Study of the thermal properties of miscible blends between poly(ether ketone ketone) (PEKK) and polyimide

Cited by 10 publications

References 18 publications

Confinement and Distribution of the Composition in Semicrystalline/Amorphous Miscible Blends of PEKK/PEI: A Calorimetry Study

Confinement and Distribution of the Composition in Semicrystalline/Amorphous Miscible Blends of PEKK/PEI: A Calorimetry Study

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

An overview on the influence of process parameters through the characteristic of 3D-printed PEEK and PEI parts

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