Results 71 to 80 of about 539,095 (368)

Fatigue crack propagation in microcapsule toughened epoxy [PDF]

, 2004
The addition of liquid-filled urea-formaldehyde (UF) microcapsules to an epoxy matrix leads to significant reduction in fatigue crack growth rate and corresponding increase in fatigue life.
Brown, Eric N., Sottos, Nancy R., White, Scott R.   +2 more
core   +1 more source

Defect Analysis of the β– to γ–Ga2O3 Phase Transition

Advanced Functional Materials, EarlyView.
The role of defects at all the relevant stages of the β$\beta$‐ to γ$\gamma$‐Ga2O3 polymorph transition is investigated using a multi method approach. The positron annihilation spectroscopy based results show that the defect density decreases after the transition, and that changes in defect configuration within the γ phase occur with increasing ...
Umutcan Bektas, Maciej O. Liedke, Huan Liu, Fabian Ganss, Maik Butterling, Nico Klingner, René Hübner, Ilja Makkonen, Andreas Wagner, Gregor Hlawacek   +9 more
wiley   +1 more source

Numerical Study of Frequency and Deflection Responses of Natural Fiber (Luffa) Reinforced Polymer Composite and Experimental Validation

Journal of Natural Fibers, 2020
The natural fiber (Luffa cylindrica fiber) reinforced epoxy composite has been fabricated and their structural responses (frequency and deflection) have been computed experimentally and numerically first time using the corresponding experimental elastic ...
Hitesh B. Bisen, Chetan Kumar Hirwani, Rajesh Kumar Satankar, Subrata Kumar Panda, Kulmani Mehar, Brijesh Patel   +5 more
doaj   +1 more source

The Effect of POSS Type on the Shape Memory Properties of Epoxy-Based Nanocomposites

Molecules, 2020
Thermally activated shape memory polymers (SMPs) can memorize a temporary shape at low temperature and return to their permanent shape at higher temperature. These materials can be used for light and compact space deployment mechanisms.
Avraham I. Bram, Irina Gouzman, Asaf Bolker, Noam Eliaz, Ronen Verker   +4 more
doaj   +1 more source

Ionic Control of Microstructure and Lubrication in Charged, Physically Cross‐Linked Hydrogels

Advanced Functional Materials, EarlyView.
Here, charged, physically cross‐linked poly(methacrylamide‐co‐methacrylic acid) hydrogels stabilized by a short‐range attractive, long‐range repulsive potential is investigated. This work uncovers how salt addition alters not only swelling, but also the microstructure and dynamics, near‐surface stiffness and charge, and ultimately, its lubricity. Salts
Alexander Deptula, Rosa M. Espinosa‐Marzal   +1 more
wiley   +1 more source

Scots Pine Bark Extracts as Co-Hardeners of Epoxy Resins

Molecules
Extracts from natural waste like bark or leaves are great sources of phytochemicals, which contain functional groups (hydroxyl, carboxylic, vinyl, allyl) attractive in terms of polymer synthesis.
Tomasz Szmechtyk
doaj   +1 more source

Effect of Curing Temperature on Mechanical Properties of Natural Fiber Reinforced Polymer Composites

Journal of Natural Fibers, 2018
Nowadays, growing environmental concerns have led many researchers to work in the area of natural fiber reinforced polymer composites. In this work, jute fiber has been used as reinforcement and epoxy as matrix material to develop partially biodegradable
Jai Inder Preet Singh, Sehijpal Singh, Vikas Dhawan   +2 more
doaj   +1 more source

Designed-in molecular interactions lead to superior thermo-mechanical properties in nanocomposites [PDF]

, 2011
The effect of the nanofiller chemistry on the mechanical behaviour of thermoset polymer matrix nanocomposites is investigated. The interaction between a crosslinked polymer resin and the reinforcing nanofibers driven by their chemistry is revealed by ...
Atılgan, Ali Rana, Atilgan, Ali Rana, Atılgan, Canan, Atilgan, Canan, Bilge, Kaan, Menceloglu, Yusuf Z., Menceloğlu, Yusuf Z., Ozden Yenigun, Elif, Papila, Melih, Özden Yenigün, Elif   +9 more
core   +1 more source

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva, Giulio Fatti, Emanuel Carlos, Guilherme Ferreira, Sumita Goswami, Suman Nandy, Luiz H. C. Mattoso, Elvira Fortunato, Caio G. Otoni, Rodrigo Martins   +9 more
wiley   +1 more source

Postbuckling behavior of graphite-epoxy panels [PDF]

, 1984
Structurally efficient fuselage panels are often designed to allow buckling to occur at applied loads below ultimate. Interest in applying graphite-epoxy materials to fuselage primary structure led to several studies of the post-buckling behavior of ...
Dickson, J. N., Rouse, M., Starnes, J. H., Jr.   +2 more
core   +1 more source