Materials Literature
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Strictly linear amyloses have been heated in a sealed ampoule in the presence of salicylic acid (SA). When using an amylose of molecular weight 1310000 (AS-1310), two types of inclusion complexes, differing in helix structure, were formed, depending on the amount of SA. With 10% SA a complex with 71-helix structure wa…
A physical modelling investigation has been undertaken to determine the relationship between the physico-chemical properties of the liquid phase, the gas bubble size, the gas flux, and the residence times of gas in spherical foams. The testwork was conducted in a 107 mm diameter glass column in a temperature controlle…
Electrochemical interconversion between 9,9,10,10-tetraaryldihydrophenanthrene 1 and 2,2′-bis(triarylmethylium) 22+ has been proven to proceed via open form cation radical 2+· as a stable intermediate; using these three species, a novel tricolor electrochromic system that exhibits hysteretic color change (color 1 → co…
We have studied chiral induction in a nematic in contact with a chiral surface using computer simulations. Nematic and surface particles have been modelled using the Gay–Berne (GB) potential considering, additionally, a short-range chiral term for the inducing surface. We find that, close to the chiral surface, a twis…
We propose a generalisation of the Mullins–Sekerka problem to model phase separation in multi-component systems. The model includes equilibrium equations in bulk, the Gibbs–Thomson relation on the interfaces, Young's law at triple junctions, together with a dynamic law of Stefan type. Using formal asymptotic expansion…
The scope of carboxylate binding by tin(IV) porphyrins and the solution geometries of the resulting complexes have been explored using 1H NMR spectroscopy; ring current induced shifts and competition experiments indicate the operation of an attractive anthracene–porphyrin interaction; outer sphere carboxylic acid comp…
The synthesis of a discotic side group liquid crystal polymer based on poly(methyl methacrylate) is reported. This involves the oxidative coupling of 3,3′,4,4′-tetrakis(hexyloxy)biphenyl with 1-hexyloxy-2-methoxybenzene to yield the unsymmetrical triphenylene nucleus, 2-methoxy-3,6,7,10,11-pentakis(hexyloxy)triphenyle…
Description Features the most current research on design procedures and flowable fill applications, as well as five ASTM standards on CLSM. 26 peer-reviewed papers cover a wide range of new developments in the field, including: Ingredients -- Fly ash and aggregates including recycled glass are explored in four papers.…
The occurrence of dynamic recrystallization in ferritic iron, which is a typical dynamic recovery-type material, was confirmed in the present study using a Ti-added interstitial-free (IF) steel. The specimens were hot-compressed at various strain rates at various temperatures within the ferritic region and quenched im…
Mesoporous silicates synthesized in strongly basic media from sodium silicate in the presence of cetyltrimethylammonium chloride, a cationic surfactant. The formation of a lamellar phase and its transformation into hexagonal MCM-41 were studied by powder X-ray diffraction (XRD), 29Si magic-angle-spinning (MAS) NMR and…
In this work, we present the effect of high external pressure on the structures of several representative zeolites: zeolite Y (Na-Y), lithium exchanged zeolite A (Li-A) and sodalite, as studied by IR spectroscopy. Pressure-induced amorphization was observed at 19 and 18 kbar in Na-Y and Li-A, respectively. However, th…
The effects of fabric structure and mechanical properties on the draping characteristics of fabrics are studied with a systematically designed range of fabrics. The fabric cover factor has a large effect on the fabric drape because of its effect on the bending rigidity. Yarn interactions and crimp, which are determine…
Metallation of highly electron deficient 5,10,15,20-tetrakis(trifluoromethyl)porphyrin 1 with [Re2(CO)10] in refluxing PhCN resulted in a novel synthesis of oxorhenium(V) 5,10,15-tris(trifluoromethyl)corrolate 2 characterized by single crystal X-ray crystallography.
Fine and rod-like silica-based mesoporous powders with very short diameter and length have been obtained through (1) the complete dissolution of both sodium metasilicate and cationic surfactants and (2) subsequent rapid pH-adjustment for the formation of silica-surfactant mesophase products.
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation A. A. Zaman, B. M. Moudgil; Rheology of bidisperse aqueous silica suspensions: A new scaling meth…
Conducting polymers are promising materials which show attractive electric and optical properties with potential importance in advanced technologies. Electrochromism is one of the noteworthy characteristics of conducting polymers and is effective in forming conducting polymer images and patterns on an electrode. Space…
Iron(II) cryptates, where the FeII is in the high-spin S = 2 electronic configuration, even with six sp2 N-donors, and iron(III) cryptates adopting the intermediate spin S = state have been prepared. The structure of a high-spin iron(II) cryptate utilising six sp2 N-donors shows long metal–ligand distances which effec…
The formation of the interface between aluminium and O2 or CO2 plasma-modified poly(ethylene terephthalate) (PET) has been investigated by X-ray photoelectron spectroscopy (XPS). As demonstrated by the changes in the C 1s, O 1s, and A1 2p core level spectra upon A1 deposition, the metal was found to react preferential…
A mesoporous titania was prepared from titanium tetraisopropoxide and stearic acid (STA). The pore size of the titania increases linearly from ca. 5 to 15 nm with increase in the STA/Ti ratio (X) for X < 1.5, while the change becomes negligible for X > 1.5. A mol equivalent of STA coordinates with Ti atom forming a bi…
2,5-Dialkynylthiophenes (RCC)2C4H2S (R = Ph, Me3Si or But) treated successively with HBCl2 and Et3SiH in CH2Cl2 undergo hydroboration polymerization to give intensely-coloured polymers of general structure –[CHCR–BCl–CRCH–C4H2S]n– for which the 11B NMR resonances occur ca. 50 ppm upfield of those for analogous monomer…