Materials Literature
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ABSTRACT: 1H NMR and isothermal titration calorimetry (ITC) experiments were employed to obtain reliable thermody-namic data for the formation of the 1:1 inclusion complexes of fullerenes C60 and C70 with the buckycatcher (C60H28). NMR measurements were done in toluene-d8 and chlorobenzene-d5 at 288, 298, and 308 K, w…
When the thickness is reduced to nanometer scale, freestanding high molecular weight polymer thin films undergo large reduction of degree of cooperativity and coupling parameter n in the Coupling Model (CM). The finite-size effect together with the surfaces with high mobility make the α-relaxation time of the polymer…
Wood fiber-high density polyethylene composites (WPCs) with nano silicon dioxide (nano-SiO2) and ammonium polyphosphate (APP) were prepared to investigate the synergistic effects on the thermal stability and flame retardancy of WPCs. APP/nano-SiO2 has significant improvement on heat release rate (HRR), total heat rele…
Temporal resolution: 1 second. The measurement equipment (OCEANET container) was located at the portside helideck bow of RV POLARSTERN approximately 9 m above sea level.
Trabalho Final de Mestrado Integrado, Ciências Farmacêuticas, Universidade de Lisboa, Faculdade de Farmácia, 2014
1,2-Dimethylhydrazine co-ordinates to numerous metal cations. The structures of the complexes of Cr, Mn, Co, Ni, Cu, Zn, Cd, Hg and Pt are discussed and the complexing abilities of the 1,2-dimethylhydrazine molecule are determined on the basis of the ligand field spectra of the nickel and the chromium derivative.The r…
Due to the cost of materials and time consuming testing procedures, development of new batteries is a slow and expensive practice. The purpose of this study is to develop a computational model and assess the capabilities of such a model designed to aid in the design process and control of sodium sulfur batteries.;To t…
Utbredelse av Rød og Gul sone for luftkvalitet er beregnet for ny vegtrase på E39 mellom Gartnerløkka og Breimyrkrysset. Beregningene er basert på modellering av utslipp og spredning fra veg, samt estimat for bakgrunnskonsentrasjoner. Gul sone strekker seg opptil 40 m ut fra vegens midtlinje og rød sone opptil 20 m fr…
In this paper was studied the physicochemical properties and composition of solid paraffin deposits taken from wells Uzhno-Kamyshitovoe, Uzen field and paraffin deposits extracted from oil Kumkol and Akshabulak. It was showed that asphalt-resin-paraffin deposits (ARPD) density increasing depends on asphaltenes content…
Three silane coupling agents with amino, long alkyl chain or vinyl functional groups were used to modify magnesia (MgO) nanoparticles. The modified nanoparticles were then mechanically mixed with low-density polyethylene (LDPE) to fabricate insulating nanocomposites. The average size of the modified MgO aggregates dis…
The complexes Bis(η-cyclopentadienyl)-1,1-dithiolatovanadium(IV) [VCp₂(S₂C=Y)] (Y = S,NCN,C(CN)₂,C(CN) (CO₂Et),C(CO₂Et)₂)* and Bis(η-cyclopentadienyl)-1,2-dicyanoethylene-1,2-dithiolatovanadium(IV) [VCp₂(S₂C₂(CN)₂)] are prepared by reaction of [VCp₂Cl₂] and the appropiate alkali metal salt K₂S₂C=Y or Na₂S₂C₂(CN)₂. The…
High-performance polyurethane nanocomposites with surface-functionalized, nano-layered graphene sheets were fabricated by covalent incorporation. Partially reduced graphene nanosheets or surface-functionalized graphene with diazonium salts carrying phenethyl alcohol groups were physically-blended or covalently-bonded…
Visoku korozijsku otpornost nehrđajucih Cr-Ni celika omogucuje sloj kromovih oksida koji spontano nastaje procesom oksidacije na njihovoj povrsini. Prilikom zavarivanja, kao jednog od najvažnijih postupaka spajanja ovih celika, zbog unosa topline, dolazi do narusavanja homogenosti i ostecivanja oksidnog sloja. Vidljiv…
The aim of this project was to get an overall understanding for how different methods of chemical analysis can be applied for analyzing surfaces of weld wires in the welding manufacturing industry. Chemical components mainly focused on consisted of sodium (Na), potassium (K) and calcium (Ca) among other chemical eleme…
Large quantities of leather waste are generated from manufacturing processes and disposal of leather goods. Environmental directives encourage diversion of solid waste from landfills through viable recycling methods. Since leather is resistant to microbial degradation, direct recycling of leather waste through biodegr…
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International audience
Tom Berlijn, 2, 3 Hai-Ping Cheng, 2 P. J. Hirschfeld, and Wei Ku(顧威) 5 Department of Physics, University of Florida, Gainesville, Florida 32611, USA Quantum Theory Project, University of Florida, Gainesville, Florida 32611, USA Center for Nanophase Materials Sciences and Computer Science and Mathematics Division, Oak…
Poly(ethylene terephthalate) (PET) is a thermoplastic with excellent properties such as mechanical and chemical resistance, thermal stability. Despite its good qualities, PET is not biodegradable and its negligent disposal has been resulting in serious environmental problems. According to this scenario, chemical recyc…
In this paper, a methodology is developed to evaluate the design performance of polymer resin in a carbon fibre reinforced composite using atomistic simulation. Critical values are determined for strain invariants and related to the structural performance of the material system. The usefulness of the approach is demon…