Photochemical evolution of poly(ether ether ketone)

Giancaterina, S; Rossi, A; Rivaton, Agnès; Gardette, Jean‐Luc

doi:10.1016/s0141-3910(99)00181-0

Cited by 60 publications

(47 citation statements)

References 27 publications

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“…In the carbonyl region, an increase of absorbance around 1730 cm -1 was recorded. This hump, which fits the ester band of the O-C=O, indicates the phototransformation of benzophenone units [1,29]. In the complex region, a decrease in absorbance was observed at around 1215 cm -1 .…”

Section: Chemical Analysismentioning

confidence: 87%

“…A previous study reported that aromatic ethers are dissociated from main molecular chains and subsequently recombined to esters by UV radiation [1]. For UV exposure to aromatic polymers, crosslinking reactions are caused in parallel to chain scission [1][2]10]. The main chain scissions occur as consequences of primary photodissociation and secondary radical formation [5].…”

Section: Discussionmentioning

confidence: 99%

“…After UV irradiation, an increase of absorbance was observed in a range from 3150 to 3700 cm -1 , showing a maximum value around 3400 cm -1 . The maximum is in the range of polymeric hydrogen-bonded OH stretch [1,29]. In the carbonyl region, an increase of absorbance around 1730 cm -1 was recorded.…”

Section: Chemical Analysismentioning

confidence: 99%

“…Photodegradation of polymeric material has been extensively investigated, and most studies of deterioration were generally conducted under UV irradiation [1][2][3][4][5][6][7][8][9][10][11]. Polymers are used under stress in most practical applications; therefore, several studies of the combined effect of photo-oxidation and mechanical stress have been discussed [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…PEEK, a commercial polymer important for its high thermal stability and excellent formability, also has good resistance to such ionizing radiation as electron beams [22,27]. Previous photo deterioration studies of PEEK have mainly focused on chemical analyses [1,6,7,11]. In this paper, we concentrated on its mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Photodegradation of PEEK sheets under tensile stress

Nakamura

Noguchi

et al. 2006

Polymer Degradation and Stability

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The photochemical reaction of poly(ether ether ketone) (PEEK) sheets under tensile loads has been investigated. Two types of UV irradiation tests were carried out in a vacuum environment: with and without a cooling apparatus. Chemical structures, thermal properties, and mechanical properties were measured to clarify photo deterioration. Chemical analysis based on Fourier Transform Infrared Spectrometer (FT-IR) and X-ray Photoelectron Spectroscopy (XPS) showed photochemical scission caused by UV exposure. Thermal properties, measured by Differential Scanning Calorimeter (DSC), indicated that a crosslinking reaction occurred during the radiation tests. Tensile properties of PEEK sheets after UV radiation clearly showed a tendency to embrittlement affected not only by crosslinking but also by the orientation of molecular chains resulting from the temperature rise of the specimens. Furthermore, applied tensile stress during exposure accelerated molecular scission and disturbed the crosslinking effects of the tensile properties.

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Section: Chemical Analysismentioning

confidence: 87%

Section: Discussionmentioning

confidence: 99%

Section: Chemical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Photodegradation of PEEK sheets under tensile stress

Nakamura

Noguchi

et al. 2006

Polymer Degradation and Stability

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Photochemical Stability of Materials for OPV

Manceau¹,

Rivaton

Gardette

2012

Stability and Degradation of Organic and Polymer Solar Cells

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Light‐Driven Shape Memory of 3D‐Printed PEEK for Programmable Actuations

Yang

Chen

Liu

et al. 2022

Adv Materials Technologies

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Remotely controllable actuation of engineering polymers is highly demanded in the fast‐developing intelligent society. Here, this work demonstrates that the programmable shape memory of 3D‐printed poly(ether ether ketone) (PEEK), which is an excellent engineering material, could be driven by both ultraviolet (UV) light and natural sunlight. The shape recovery ratio reaches 97.6% and could be finely regulated by defining the sample thickness, shape programming, way of placement, and light intensity. Light‐induced continuous, sequential, and programed actuations (shape recovery) are further realized in various 3D‐printed PEEK structures. Meanwhile, the coating of a thin layer of gold is proven to be effective in anti‐UV oxidation and the enhancing of shape recovery. Moreover, natural sunlight during daytime is demonstrated to be able to induce the shape recovery of 3D‐printed PEEK in outdoor environment. The work here can pave the way for the use of PEEK as a smart material in the fields such as aerospace and intelligent industry.

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Photochemical evolution of poly(ether ether ketone)

Cited by 60 publications

References 27 publications

Photodegradation of PEEK sheets under tensile stress

Photodegradation of PEEK sheets under tensile stress

Photochemical Stability of Materials for OPV

Light‐Driven Shape Memory of 3D‐Printed PEEK for Programmable Actuations

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