Results 51 to 60 of about 123,753 (242)
Advanced Engineering Materials, EarlyView.A methodology for establishing an ontology‐augmented structural digital twin for fiber‐reinforced polymer structures dedicated to individual lifetime prediction, in this case, a wind turbine rotor blade, is introduced. The methodology resembles the manufacturing as well as the operation of the structure.
Marc Luger +6 more
wiley +1 more source
Cytotoxic Dammarane-Type Triterpenoids from Aglaia cucullata Peel Fruit
Indonesian Journal of ChemistryFour triterpenoids, known as dammarane-type, dammaradienone (1), 20(S),25-epoxy-5α-dammar-20-en-3-one (2), 20(S)-5α-dammar-24-en-3α,20-diol-3-acetate (3) and 3α-acetyl-20S,24S-epoxy-25-hydroxydammarane (4), were isolated from Aglaia cucullata peel fruit.
Intan Hawina Anjari +8 more
doaj +1 more source
Divanillin-based aromatic amines: synthesis and application as curing agents for bio-based epoxy thermosets [PDF]
Frontiers in Chemistry, Frontiers, 2019, 7, 2019 New bio-based diamines were successfully synthesized from vanillin and fully characterized. These amines, methylated divanillylamine (MDVA) and 3,4-dimethoxydianiline (DMAN), were then used as curing agent with epoxy monomers. Epoxy thermosets obtained from these new bio-based amines exhibited promising thermomechanical properties in terms of glass ...
arxiv +1 more source
Polymer of phosphonylmethyl-2,4- and -2,6-diamino benzene and polyfunctional monomer [PDF]
, 1986 A phosphonyl methyl benzene is prepared by nitration to produce a 2,4-dinitro phosphonyl methyl benzene, which is then reduced to a diamino compound. The diamino compound is then used to cure a polymerizable monomer.
Kourtides, D. A., Mikroyannidis, J. A.
core +1 more source
Advanced Engineering Materials, EarlyView.The microstructure of Cr‐rich Cr‐Si‐alloys is maintained by alloying with Ge, Pt, and Mo. The effects of these elements on A15‐phase fraction, partitioning, microstructural stability, grain size, and hardness are combinable. Molybdenum is found to be the most promising alloying element for microstructural stability during high‐temperature exposure.
Anke Silvia Ulrich +6 more
wiley +1 more source
New Thermal and Microbial Resistant Metal-Containing Epoxy Polymers
Bioinorganic Chemistry and Applications, 2010 A series of metal-containing epoxy polymers have been synthesized by the condensation of epichlorohydrin (1-chloro-2,3-epoxy propane) with Schiff base metal complexes in alkaline medium. Schiff base was initially prepared by the reaction of 2,6 dihydroxy
Tansir Ahamad, Saad M. Alshehri
doaj +1 more source
Molecules, 2022 In this study, we prepared a difunctionalized cyanate ester double-decker silsesquioxane (DDSQ-OCN) cage with a char yield and thermal decomposition temperature (Td) which were both much higher than those of a typical bisphenol A dicyanate ester (BADCy ...
Yang-Chin Kao +5 more
doaj +1 more source
Superior enhancement in thermal conductivity of epoxy/graphene nanocomposites through use of dimethylformamide (DMF) relative to acetone as solvent [PDF]
arXiv, 2022 In this work, we demonstrate that use of dimethylformamide (DMF) as a solvent leads to better dispersion of graphene nanoplatelets in epoxy matrix compared to acetone solvent, in turn leading to higher thermal conductivity epoxy-graphene nanocomposites.
arxiv
Piezoelectric polyvinylidene fluoride-based epoxy composites produced by combined uniaxial compression and poling [PDF]
Appl. Phys. Lett. 115, 192902 (2019), 2019 We present a simple, efficient method, which combines uniaxial compression and subsequent poling, to produce piezoelectric polyvinylidene fluoride-based epoxy composites. The values of the piezoelectric factors obtained are slightly higher than those of neat piezoelectric polyvinylidene fluoride.
arxiv +1 more source
Development of new processes to protect zinc against corrosion, suitable for on-site use [PDF]
, 2011 Protection against corrosion of metals is well known as an important issue in numerous fields. In all cases, the improvement of durability of these metals has to be connected to the development of environmentally friendly processes.
Ansart, Florence +4 more
core +1 more source