Materials Literature
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Two dicationic salts with bis(triflimide) as counterions exhibited crystal-to-smectic liquid crystalline phase transitions (T m=41 and 37°C) and smectic-to-isotropic liquid phase transitions (T i=112, 136°C). They had a broad liquid crystalline phase range (71–99°C) and an excellent range of thermal stability (360–364…
We determined the crystallization region of KNd(PO 3 ) 4 (KNP), the isotherms of saturation temperature, and three neighboring phases of this crystallization region, NdPO 4, Nd(PO 3 ) 3, and NdP 5 O 14, in the Nd 2 O 3 −K 2 O−P 2 O 5 system. We successfully grew KNP single crystals by the top seeded solution growth sl…
A novel pH- and salt-responsive carboxybetaine monomer, 4-( N, N -diallyl- N -methylammonio)butanoate ( 2 ), was prepared and cyclocopolymerized with the cationic monomer N, N -diallyl- N, N -dimethylammonium chloride ( 3 ) in 0.5 M NaCl aqueous solution (pH = 7.0) using 2-hydroxy-1-[4-(hydroxyethoxy)phenyl]-2-methyl-…
Abstract— Rolls of flexible displays or electronic paper have recently been prepared by a high‐speed roll‐to‐roll manufacturing process based on SiPix's novel Microcup® and top‐sealing technologies. Both Microcup® electrophoretic displays (EPDs) and LCDs have been demonstrated. The display rolls are format flexible an…
(1 – x )(Bi 0.8 La 0.2 )(Ga 0.05 Fe 0.95 )O 3 · x PbTiO 3 (BLGF‐PT) crystalline solutions have been fabricated by solid‐state reactions. BLGF‐PT has single perovskite phase structure with a rhombohedral–tetragonal (FE r ‐FE t ) morphotropic phase boundary (MPB) at a PT content of x = 0.43. Lanthanum substitution has b…
A model was constructed to describe the prolate shape of anisotropic regions, tactoids, coexisting with the isotropic phase in lyotropic inorganic liquid crystals. The elastic energy of the tactoid, the surface energy, and the interaction energy between the director field and the boundary of the tactoid were taken int…
Abstract The thermal transformations of kaolinite have been studied using 27 Al and 29 Si magic angle spinning nuclear magnetic resonance (MAS NMR), X-ray diffraction (XRD), differential thermal analysis (DTA) and thermogravimetric analysis (TG). The experimental results show that this sample is a pure kaolinite which…
Wide tribology concept through the knowledge interaction from physics, chemistry and various engineering disciplines, has put tribology in a group with interdisciplinary sciences. This work gives information about the international standardization in the field of tribology, International Tribology Council, whose membe…
Abstract A method for rapid quantitative analysis of the content and distribution of short chain branching (SCB) for α‐olefin/ethylene copolymers based on thermally fractionated DSC is presented. Eight commercial polyethylenes, four made with conventional Ziegler‐Natta catalysts and four made with metallocene catalyst…
Transient structure and crystallization behaviors in cold-drawn PET fibers were studied by synchrotron wide-angle X-ray diffraction, IR spectroscopy, and thermomechanical analysis. As-spun PET fibers were mechanically cold-drawn up to the breaking point, and those stretched ones beyond the strain hardening point in th…
Abstract Phthalate plasticizers have historically served as the preferred plasticizers to impart flexibility to PVC and several other polar polymers. They provide a desirable balance of cost and performance properties. Their acceptable and safe use is unmatched in medical appliances, food processing, and packaging app…
The idea of doping carbon nanotubes is attractive since it provides various possibilities for controlling the physical properties of carbon nanotubes. In this review, we have summarized recent progress on the experimental and theoretical studies of carbon nanotubes doped with nonmetals, alkali metals, transition metal…
Abstract A new method for calculation of layer charge and charge distribution of smectites is proposed. The method is based on comparisons between X-ray diffraction (XRD) patterns of K-saturated, ethylene glycol-solvated, oriented samples and calculated XRD patterns for three-component, mixed-layer systems. For the ca…
Four new copper(II) complexes of formula [Cu(2)(tppz)(dca)(3)(H(2)O)].dca.3H(2)O (1), [Cu(5)(tppz)(N(3))(10)](n)() (2), [[Cu(2)(tppz)(N(3))(2)][Cu(2)(N(3))(6)]](n)() (3), and [Cu(tppz)(N(3))(2)].0.33H(2)O (4) [tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine and dca = dicyanamide anion] have been synthesized and structurall…
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTPoly(polyrotaxane): Photoreactions of 9-Anthracene-Capped PolyrotaxaneMiyuko Okada and Akira HaradaView Author Information Department of Macromolecular Science, Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043,…
Two phenylethynyl terminated oligomers designated PETI-298 and PETI-330 were developed at the NASA Langley Research Center and have emerged as leading candidates for composite applications requiring high temperature performance (i.e. ≥ 288 °C for 1000 hours) combined with the ability to be readily processed into compo…
Abstract Different forms of structural and chemical heterogeneity are considered including mixed-layer minerals, disordered layer structures containing rotational and translational stacking faults, interstratification of trans -vacant ( tv ) and cis -vacant ( cv ) layers in true micas, illites and illitesmectite (I-S)…
The process of incorporation of pyridine in the nanostructured tunnels of sepiolite was studied in detail, using various complementary characterization techniques, microporosimetry, thermal gravimetric analysis, FTIR, and multinuclear solid-state NMR. It is demonstrated that a remarkable nanohybrid material, SEP−PYR,…
Abstract This paper presents the effects of process conditions and nano‐clay fillers on the microstructure (namely, size, density, and distribution of microcells within samples) and the resulting mechanical properties of microcellular injection molded polyamide‐6 (PA‐6) nanocomposite and its neat‐resin counterpart. Ba…
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