Cited by 212Polymer crystallization and propertiesFiber-reinforced polymer compositesbiodegradable polymer synthesis and properties

Crystallinity studies of PEKK and carbon fibre/PEKK composites: A review

Open access
Pérez-Martín, Helena, Mackenzie, Paul, Baidak, Alex, Ó Brádaigh, Conchúr M., Ray, Dipa·2021·Composites Part B Engineering

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Integrity signals

Registry

Crossref · 10.1016/j.compositesb.2021.109127

Cites

96 of 96 references verified0 citation errors · 0 not checkable

Statistics

Claims the paper makes

The claims and statistics of this paper haven’t been checked yet.

Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.

A few free checks a day · papers already verified open instantly · results are public

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • PEKK has a lower melt viscosity, making it easier to work with during printing, and its printing temperature is slightly lower than that of PEEK.

    “Additionally, PEKK has a lower melt viscosity, making it easier to work with during printing. Furthermore, the printing temperature of PEKK is slightly lower than that of PEEK.”

    From A comprehensive review of lunar-based manufacturing and construction (2024) · cites this paper as [217]

    The Introduction (p. 4) says PEKK has a lower processing temperature than PEEK, which supports the temperature comparison broadly, but does not specifically compare printing temperatures or describe the difference as slight. Its viscosity discussion concerns different PEKK grades, not PEKK versus PEEK; the paper does not establish that lower melt viscosity makes PEKK easier to print. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • PEKK features an additional ketone group in its chemical structure compared to PEEK.

    “In comparison to PEEK, PEKK features an additional ketone group in its chemical structure.”
  • PEKK offers superior thermal stability with a higher glass transition temperature (Tg) at around 162°C, in contrast to PEEK's Tg of about 143°C.

    “PEKK offers superior thermal stability, boasting a higher glass transition temperature (Tg) at around 162 ◦ C in contrast to PEEK, with a Tg of about 143 ◦ C.”

    From A comprehensive review of lunar-based manufacturing and construction (2024) · cites this paper as [217]

    The Introduction (p. 4) and Isothermal Crystallisation section (p. 18) compare PEKK and PEEK crystallisation, not their glass-transition temperatures or thermal stability. Searches for Tg, glass transition, 162°C and 143°C found no passage in our copy supporting the stated comparison. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

The self-check needs the paper’s full text.

Cites

Flagged first, then by citations

2 of the 98 references couldn’t be matched to a known paper.

Research works printed but not linked: 2

  1. [28][28] Painter PC, Coleman MM. Polymer Morphology. Fundam. Polym. Sci. Introd. Text. 2nd edition, Routledge; 1997, p. 250-3. -
  2. [74][74] Cowie JMG. The crystalline state: Kinetics of crystallization. Polym. Chem. Phys. Mod. Mater. 2nd edition, Blackie Academic & Professional; 1998. -

Cited by

Sorted by citations

Authors
Pérez-Martín, H., Mackenzie, P., Baidak, A., Ó Brádaigh, C. M., & Ray, D.
Affiliations
  • University of Edinburgh (GB)
  • Hexcel (United Kingdom) (GB)
Corresponding author
Ray, Dipa
Venue
Composites Part B Engineering
Publisher
Elsevier BV
Published
2021-10
Volume
223
Pages
109127
ISSN
1359-8368 (ISSN-L)
OpenAlex
W3182470399
Cited by
212
References
98
Citations by year
2026: 45 · 2025: 57 · 2024: 43 · 2023: 40 · 2022: 23 · 2021: 4
FWCI
9.74
Type
journal article
Language
en
Open access
Locations
  • Composites Part B Engineering (publishedVersion)
  • White Rose Research Online (University of Leeds, The University of Sheffield, University of York) (acceptedVersion)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, other-oa)
Topics
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
  • Physical Sciences › Engineering › Mechanical Engineering › Fiber-reinforced polymer composites
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
Keywords
PEKK, carbon fiber composites, crystallinity, crystallization kinetics, transcrystallinity, fiber-matrix interface, autoclave processing, automated tape placement, 3D printing, high-performance thermoplastics

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review