Materials Literature
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Polymer nanocomposites possess promising high performances as engineering materials, if they are prepared and fabricated properly. It was also clarified that they could provide favorable performances as dielectrics and electrical insulation. Comprehensive reviews were given in literatures by the author firstly in 2004…
Developments in X-ray analysis hardware and software have combined to dramatically improve the throughput, speed, and accuracy of formulation analyses. We will focus on a complimentary development, the growth and application of a comprehensive database based on the Powder Diffraction File™ (PDF®). The PDF is an edited…
The telecom boom of the late 1990s helped drive a revolution in thin-film technology. As a result, new deposition techniques have been developed that can withstand environmental challenges such as humidity and thermal stress.
The synthesis and phase behaviour of the first cuneane derivatives having liquid crystalline properties are reported. This new class of liquid crystalline materials is the homologous series of bis[4‐(n‐alkoxyphenyl)]cuneane‐2,6‐dicarboxylates. They were synthesized by two methods: either by isomerization of the previo…
The DFT B3LYP geometry optimization was carried out and the IR spectra were calculated for rhodium(II) tetracarboxylate complexes Rh 2 (O 2 CR) 4 (R = H, CH 3 , CF 3 , C 6 H 5 ) and for the compound Rh 2 (O 2 CH) 4 (H 2 O) 2 with two axially coordinated water molecules. A minor influence of the substituent R on the el…
We studied the structural transitions in ferronematics based on the thermotropic nematic liquid crystal MBBA (4′ -methoxybenzylidene-4-n-butylaniline) having a nematic-to-isotropic transition temperature T N–I = 48.0○C and in MBBA-based ferronematics doped with a magnetic suspension consisting of Fe3O4 particles (10 n…
Surface-modified mesoporous silicas (MSs) were investigated for recyclable adsorption of an endocrine disrupter, bisphenol A (BPA). Surface-modified MSs were prepared by (i) post-synthesis surface modification of MSs using surface hydroxyl groups and organosilanes (m-MS) and by (ii) co-condensation of tetraethoxysilan…
The graft copolymerization of acrylic acid (AA) onto styrene butadiene rubber (SBR) was carried out in toluene at 80°C using benzoyl peroxide (BPO) as initiator. The synthesized styrene butadiene rubber-g-acrylic acid (SBR-g-AA) was characterized with Raman IR spectroscopy. A study was conducted on the use of SBR-g-AA…
GCMC simulations are applied to the adsorption of sub-critical ammonia on graphitized carbon black at 240 K. The carbon black was modelled both with and without carbonyl functional groups. Large differences are seen between the amount adsorbed for different carbonyl configurations at low pressure (P < 10 kPa). Once a…
The electron structure of undoped LaMnO3 and slightly doped La1−x SrxMnO3 manganites has been calculated within the framework of a generalized tight binding method with explicit allowance for strong intraatomic electron correlations. According to the results of these calculations, the ground state in orbitally disorde…
Abstract We have investigated a new design for a turning film used in combination with wedge‐shaped light guide plates. The selected design has a top periodic lenticular structure that is in registration with the bottom periodic prisms. Relative registration shift in the prisms and the top lenticular structure was fou…
Frustrated Smectic Phase Appearing as Transitional State between Single-Layer and Antiferroelectric Bilayer Smectic Phases in Binary Mixtures of Dimeric Compounds, Izumi, Tatsuya, Naitou, Yuu, Tokita, Masatoshi, Watanabe, Junji
Highly concentrated suspensions of ultrafine alumina powders are prepared using 2‐phosphonobutane‐1,2,4‐tricarboxylic acid as dispersant. The coagulation of these suspensions is carried out at around 278 K by adding a blend of acetic anhydride plus ethylene glycol. Coagulation takes place through a pH shift because of…
Nano-Ti particles with grain sizes of 56 nm ~ 128 nm were modified by inoculating an organic amine Junctional group onto their surface using a two-step process. These modified nano-Ti particles were dispersed into the bisphenol A-type epoxy resin and then cured with polyamide to form a coating on the metal substrates.…
Este trabalho teve como objetivo determinar as propriedades de painéis fabricados com mistura de partículas de madeira de Eucalyptus grandis, polietileno de alta densidade, polietileno de baixa densidade e polipropileno. Empregaram-se duas formulações adesivas (uréia-formaldeído e uréia-formaldeído contendo 0,5% de ep…
The study evaluates the possibility of enhancing uptake of etoposide (topoisomerase II inhibitor) by tumor when delivered through polysorbate 20 micelles. The micelle formation was ascertained by determining the critical micellar concentration (CMC) with a du Nouy ring tensiometer and by size measurement using dynamic…
The nature of source/drain contacts in graphene field-effect transistors (GFETs) is investigated. We argue that the energy dispersion of the graphene portion underneath of the metal electrodes is substantially altered compared to its original. Moreover, different from other materials, the Fermi levels of these graphen…
The fusion method was used to produce PbS quantum dots (QDs) embedded in S-doped glass matrix (SiO2-Na2CO3-Al2O3-PbO2-B2O3:S). Measurements of optical absorption (OA), photoluminescence (PL) and atomic force microscopy (AFM) have been carried out in order to characterize the produced QDs. A strong red-shift observed i…
George Marsh visited GKN Aerospace's composites centre on the Isle of Wight, UK.
The influence of β crystalline form nucleating agent (β nucleator) on the mechanical properties of homo-polymerized polypropylene (PPH), random-copolymerized polypropylene (PPR), block-copolymerized polypropylene (PPB), and PPH/PPR/PPB blends was studied. Polarized optical microscopy (POM), differential scanning calor…