Results 171 to 180 of about 628,978 (424)

Composite materials with uncured epoxy matrix exposed in stratosphere during NASA stratospheric balloon flight [PDF]

open access: yesarXiv, 2010
A cassette of uncured composite materials with an epoxy resin matrix was exposed in the stratosphere (40 km altitude) over 3 days. Temperature variations of -76...+32.50C and pressure up to 2.1 Torr were recorded during flight. An analysis of the chemical structure of the composites showed, that the polymer matrix exposed in the stratosphere becomes ...
arxiv  

Enabling Additively Manufactured Electronics Through Laser Induced Graphene and Copper Deposition on Fully‐Aromatic Polyimides

open access: yesAdvanced Materials Technologies, EarlyView.
This article introduces a hybrid manufacturing approach to create conductive pathways in additively manufactured fully‐aromatic polyimides. This is enabled through a combination of high‐resolution laser scribing process for fabricating graphene and metallizing it with electrodeposition of copper to further increase conductivity.
Heather D. Wotton   +6 more
wiley   +1 more source

Revestimentos de alta camada obtidos com a modificação de resinas epóxi novolaca pela reação com organo-siloxano e catálise ácida

open access: yesQuímica Nova
Epoxy resins are an important class of thermostable polymers, widely used in structural applications or as adhesives. However, the low fracture resistance is their main weakness in many applications.
Roberta Jachura Rocha   +3 more
doaj   +1 more source

The correlation of low-velocity impact resistance of graphite-fiber-reinforced composites with matrix properties [PDF]

open access: yes
Summarized are basic studies that were conducted to correlate the impact resistance of graphite-fiber-reinforced composites with polymer matrix properties. Three crosslinked epoxy resins and a linear polysulfone were selected as composite matrices.
Bowles, K. J.
core   +1 more source

Progress in Flexible Perovskite Solar Cells: Paving the Way for Scalable Manufacturing

open access: yesAdvanced Materials Technologies, EarlyView.
Perovskite solar cells (PSCs) are well positioned for a successful market uptake. This is due to an unprecedented improvement of their efficiency and stability since the first report in 2009. In this review paper, the building blocks for the scalable manufacturing and future commercialization of flexible PSCs and their pathway to impact will be ...
Dimitar I. Kutsarov   +5 more
wiley   +1 more source

Phosphorus-containing bisimide resins [PDF]

open access: yes, 1981
The production of fire-resistant resins particularly useful for making laminates with inorganic fibers such as graphite fibers is discussed. The resins are by (1) condensation of an ethylenically unsaturated cyclic anhydride with a bis(diaminophenyl ...
Fohlen, G. M.   +2 more
core   +1 more source

Design of a Simple and Rugged Soft Polydimethylsiloxane‐Carbon Nanotube‐Graphene‐Based Composite Sensor

open access: yesAdvanced Materials Technologies, EarlyView.
This research presents an easy to fabricate, low‐cost, flexible piezoresistive deformation sensor comprised of a carbon nanotube, few‐layer graphene, and polydimethylsiloxane composite. The sensor detects deformations and vibrations up to 600 Hz with 0.1% strain sensitivity from stiff and soft targets in dry and wet environments.
Sinan Candan   +9 more
wiley   +1 more source

Hard and Tough Epoxy Resins Modified with Thermosetting Materials

open access: yesIbn Al-Haitham Journal for Pure and Applied Sciences, 2019
Epoxy resins were modified by some thermosetting materials using unsaturated polyesters which were cured with styrene , MMA ,and MA . When unsaturated Polyester ( as thermosetting material ) was used , and cured with styrene showed better results than ...
H . M . Abdullah
doaj  

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