Results 31 to 40 of about 3,171 (198)

High-performance thermoplastic composites poly(ether ketone ketone)/silver nanowires: Morphological, mechanical and electrical properties [PDF]

open access: yes, 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

Mechanical performance of graphenex/poly(ether ketone ketone) composite sheets by hot pressing

open access: yesScientific 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

Quantitative Structural Study of Cold-Crystallized PEKK

open access: yesACS 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]

open access: yes, 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

Laser transmission welding as an assembling process for high temperature electronic packaging. [PDF]

open access: yes, 2016
Higher efficiency, power density, reliability and longer lifetime of power electronic devices would stem from progresses in material science. In this work, we propose to use a high performance thermoplastic polymer PAEK as packaging box to extend the ...
Chabert, France   +8 more
core   +2 more sources

On Types of Elliptic Pseudoprimes

open access: yes, 2021
We generalize the notions of elliptic pseudoprimes and elliptic Carmichael numbers introduced by Silverman to analogues of Euler-Jacobi and strong pseudoprimes.
Babinkostova, L.   +2 more
core   +1 more source

Designer Adhesives for Tough and Durable Interfaces in High‐Performance Ti‐Carbon PEKK Hybrid Joints

open access: yesAdvanced 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

Permutation graphs, fast forward permutations, and sampling the cycle structure of a permutation [PDF]

open access: yes, 2003
A permutation P on {1,..,N} is a_fast_forward_permutation_ if for each m the computational complexity of evaluating P^m(x)$ is small independently of m and x. Naor and Reingold constructed fast forward pseudorandom cycluses and involutions.
Boaz Tsaban, Naor, Schneier, Shepp
core   +2 more sources

Analysis and development of a brazing method to weld carbon fiber-reinforced poly ether ketone ketone with amorphous PEKK

open access: yesAdvanced 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

Divisors of the Euler and Carmichael functions [PDF]

open access: yes, 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

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