Results 111 to 120 of about 3,071 (184)

A study of thermal transitions in a new semicrystalline thermoplastic polyimide [PDF]

A polyimide derive from 4,4'-isophthaloyl diphthalic anhydride (IDPA) and 1,3-bis (4-aminophenoxy 4'-benzoyl) benzene (1,3-BABB) having semicrystalline behavior was prepared and characterized by differential scanning calorimetry (DSC) and wide angle X ...
Gautreaux, Carol R., Gerber, Margaret K., Pratt, J. Richard, St.clair, Terry L.   +3 more
core   +1 more source

Sternal Reconstruction Utilizing a Custom 3D-Printed Polyetherketoneketone Implant

Annals of Thoracic Surgery Short Reports
Anterior chest wall reconstruction after sternal resection remains challenging. Implants and prosthetic reconstructive materials should offer ample tissue ingrowth, maintain structural integrity and physiology, minimize infection risk, and maximize ...
Eric Lisznyai, MD, Haroutioun Boyajian, MD, Ikenna Okereke, MD, Deangelo Ferguson, MD, Aamir Siddiqui, MD, Andrew M. Popoff, MD   +5 more
doaj   +1 more source

Ray class fields generated by torsion points of certain elliptic curves [PDF]

, 2010
We first normalize the derivative Weierstrass $\wp'$-function appearing in Weierstrass equations which give rise to analytic parametrizations of elliptic curves by the Dedekind $\eta$-function.
Dong, Dong Hwa Shin, Ja Kyung Koo, Sung Yoon   +3 more
core  

Regular embeddings of complete bipartite maps: classification and enumeration

The regular embeddings of complete bipartite graphs Kn, n in orientable surfaces are classified and enumerated, and their automorphism groups and combinatorial properties are determined.
Jones, Gareth
core   +1 more source

Pixel Coloring modelling of PEKK crystallization

, 2019
Les propriétés de la matrice thermoplastique dépendent fortement de la morphologie cristalline formée durant le refroi-dissement. Afin de prévoir la taille des entités cristallines, d’évaluer l’impact de la formation d’une phase transcristallineautour des fibres, et de faire le lien entre cinétique de cristallisation et la morphologie, une approche de ...
Chelaghma, Saber, Passieux, Jean-Charles, de Almeida, Olivier, Périé, Jean-Noël, Marguerès, Philippe, Vinet, Alain   +5 more
openaire   +1 more source

Use of high-performance polymeric materials in customized low-cost robotic grippers for biomechatronic applications: experimental and analytical research

Frontiers in Materials
Advancements in materials science and 3D printing technologies have opened up new avenues for developing low-cost robotic grippers with high-performance capabilities, making them suitable for various biomechatronic applications.
Răzvan Ioan Păcurar, Filippo Sanfilippo, Martin Bjaadal Økter, Diana-Irinel Băilă, Cătălin Zaharia, Adrian Ionuţ Nicoară, Ionuț Cristian Radu, Tom Savu, Filip Górski, Wiesław Kuczko, Radosław Wichniarek, Dan Sorin Comşa, Martin Zelenay, Paweł Woźniak   +13 more
doaj   +1 more source

Biomechanical behavior of implant retained prostheses in the posterior maxilla using different materials: a finite element study

BMC Oral Health
Background The aim of this study is to evaluate the biomechanical behavior of the mesial and distal off-axial extensions of implant-retained prostheses in the posterior maxilla with different prosthetic materials using finite element analysis (FEA ...
Ahmad Aboelfadl, Ludger Keilig, Kamal Ebeid, Mohamed Abdel Moniem Ahmed, Ingy Nouh, Ashraf Refaie, Christoph Bourauel   +6 more
doaj   +1 more source

Novel polyimide compositions based on 4,4': Isophthaloyldiphthalic anaydride (IDPA) [PDF]

A series of twelve high temperature, high performance polyimide compositions based on 4,4'-isophthaloyl diphthalic anhydride (IDPA) was prepared and characterized. Tough, film-forming, organic solvent-insoluble polyimides were obtained.
Pratt, J. Richard, Saintclair, Terry L.
core   +1 more source

Continuation of tailored composite structures of ordered staple thermoplastic material [PDF]

The search for the cost effective composite structure has motivated the investigation of several approaches to develop composite structure from innovative material forms. Among the promising approaches is the conversion of a planar sheet to components of
Pipes, R. Byron, Santare, Michael H.
core   +1 more source

Thermoplastic coating of carbon fibers [PDF]

A continuous powder coating system was developed for coating carbon fiber with LaRC-TPI (Langley Research Center-Thermoplastic Polyimide), a high-temperature thermoplastic polymide invented by NASA-Langley.
Allen, L. E., Edie, D. D., Lickfield, G. C., Mccollum, J. R.   +3 more
core   +1 more source