Divisors of the Euler and Carmichael functions [PDF]
, 2007 We study the distribution of divisors of Euler's totient function and Carmichael's function. In particular, we estimate how often the values of these functions have "dense" divisors.Comment: v.3, 11 pages. To appear in Acta Arithmetica.
Ford, Kevin, Hu, Yong
core +4 more sources
Mechanical performance of graphenex/poly(ether ketone ketone) composite sheets by hot pressing
Scientific Reports, 2022 Polymer composites are gradually replacing traditional metal materials in the fields of aviation, aerospace, automotive and medicine due to their corrosion resistance, light weight and high strength.
Q. B. Wang +6 more
doaj +1 more source
High-performance thermoplastic composites poly(ether ketone ketone)/silver nanowires: Morphological, mechanical and electrical properties [PDF]
, 2014 High-performance conductive thermoplastic composites poly(ether ketone ketone) (PEKK)/silver nanowires were elaborated by melt blending. Silver nanowires (AgNWs) with high aspect ratio (ξ~220) were elaborated through the polyol process in presence of ...
Dantras, Eric +3 more
core +3 more sources
Empowering Carbon Fibers With Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub> MXene: A Paradigm Shift Toward Integrated Structure-Function Composites. [PDF]
Adv Sci (Weinh)This review comprehensively outlines how Ti3C2Tx MXene transforms carbon fiber from a structural component into a multifunctional platform. We systematically detail cutting‐edge modification strategies and showcase exceptional performance in EMI shielding, energy storage, smart sensing, and beyond.
Cao H +6 more
europepmc +2 more sources
Quantitative Structural Study of Cold-Crystallized PEKK
ACS Applied Polymer Materials, 2021 Poly(ether ketone ketone) (PEKK) is a semicrystalline polymer investigated for highly demanding applications in aerospace, transportation, electronics, and oil & gas industries.
Tence-Girault, Sylvie +6 more
openaire +4 more sources
Exchange reactions of poly(arylene ether ketone) dithioketals with aliphatic diols: formation and deprotection of poly(arylene ether ketal)s [PDF]
, 2017 The dithioketal derivatives of industrially important, semi-crystalline poly(arylene ether ketone)s undergo facile exchange with aliphatic diols in the presence of N-bromo-succinimide to give a range of novel poly(arylene ether ketal)s.
Colquhoun, Howard +2 more
core +1 more source
Designer Adhesives for Tough and Durable Interfaces in High‐Performance Ti‐Carbon PEKK Hybrid Joints
Advanced Materials Interfaces, 2023 Advanced high‐performance structural applications require the right materials in the right place and suitable interface engineering. However, poor adhesion in harsh environmental conditions frequently challenge material interfaces.
Georgios Kafkopoulos +7 more
doaj +1 more source
The number of irreducible polynomials of degree n over Fq with given trace and constant terms [PDF]
, 1969 We study the number Nγ(n,c,q) of irreducible polynomials of degree n over Fq where the trace γ and the constant term c are given. Under certain conditions on n and q, we obtain bounds on the maximum of Nγ(n,c,q) varying c and γ.
Omidi Koma, B., Panario, D., Wang, Q.
core +1 more source
Advanced Manufacturing: Polymer & Composites Science, 2022 In this study, a brazing method for carbon fiber-reinforced poly ether ketone ketone (CF-PEKK) is developed that allows welding below the melting temperature of the single components. During the manufacturing of CF-PEKK laminates, a pseudo-amorphous PEKK
K. Kotzur, G. Doll, P. Hermann
doaj +1 more source
Orbit Reconstruction with 3D Printed PEKK Implant [PDF]
Journal of Head and Neck Surgery, 2019 Alloplastic materials are used in facial bony reconstruction, but the ideal material for such procedures has yet to be elucidated. 3D printed polymers are a promising new material for use in bony reconstructive procedures. This article documents the novel usage of polyetherketoneketone (PEKK) in an orbital floor reconstruction.
Armstrong Rachel, Ellis Marco
openaire +1 more source