Materials Literature
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Mesoporous silica thin films have been produced by sol–gel chemistry in the presence of cetyltrimethylammonium bromide (CTAB) template. The films were deposited on silicon or glass substrates by dip-coating and underwent different treatments to eliminate the CTAB and create porosity. As-prepared and treated coatings e…
Effects of small amounts of Fe doping for Ga site in oxide on oxide ion conductivity is investigated in this study. It is found that doping a small amount of Fe is effective for improving the oxide ion conductivity in (LSGM). The highest oxide ion conductivity was exhibited at x = 0.03 in among the Fe‐doped samples. E…
Mesoporous silica ropes and pillar-within-hollow gyroidal spheres with highly ordered nanostructure have been synthesized through acid and ammonia hydrothermal treatment. Along with hierarchical structures, mesoporous tubules and myelin fingers, such as that shown in the Figure, spontaneously form from the silica rope…
Contributors Preface Part I Topological Models for the Crystalline and Amorphous Phases (a) Description of the Atomic Arrangement in SiO-2 Polymorphs Chapter 1 The Topology of Silica Networks (by L. W. Hobbs, C. E. Jesurum and B. Berger) Chapter 2 Low-Pressure Crystalline Phases of SiO-2 (by G. Dolino) Chapter 3 Theor…
Nature's accomplishments are inspiring chemists to design new materials based on biologically formed organic and inorganic structures that have been optimized over evolutionary timescales. A recent breakthrough in biomimetic materials chemistry has seen the fusion of organic and inorganic chemistry within the channel…
Inorganic crystal engineering is the modelling, synthesis and evaluation of the properties of crystalline materials obtained from inorganic, organometallic and bioinorganic building blocks. This article will take the reader across this interdisciplinary field of research from supramolecular to materials chemistry and…
The protocols in this chapter concern postembedding immunolabeling for transmission electron microscopy; other schedules, such as pre-embedding methods, frozen tissue processes, and procedures for scanning electron microscopy, can be found elsewhere (1). In principle, immunolabeling at the electron microscope (EM) lev…
The compatibilization mechanism of some compatibilizers for blends of polyolefins with a liquid crystalline polymer (LCP) was studied. Polyethylene (PE) and polypropylene (PP) were blended with a semirigid LCP (SBH) in a batch mixer, either with and without compatibilizers. The latter were two commercially available s…
The effective Born charges and ionic displacements in the ferroelectric phase have been used for estimations of relative contributions of different ion sublattices into the value of the spontaneous polarization of ABO3 ferroelectric oxides with perovskite-type structure. The principal difference of PbTiO3 from other p…
The structural modification and phase transition in rare earth (Gd3+ and Ce3+)-doped Pb0.90La0.15TiO3 films, prepared by the sol–gel technique on Pt substrates, were studied utilizing x-ray diffraction and micro-Raman scattering techniques. Lattice parameters calculated from x-ray data indicate an increase in lattice…
Incorporation of SRF and ISAF grades of carbon black and precipitated silica improves the physical properties of the zinc stearate plasticized ionomer, namely, the zinc salt of sulfonated maleated EPDM rubber, which behaves as an ionic thermoplastic elastomer. The reinforcing ability of the fillers follows the order S…
Multi-channel confocal micro-Raman spectroscopy was used to characterize silica-supported PdCl2 powder (PdCl2/SiO2) and Pd–B amorphous alloy catalyst (Pd–B/SiO2) which is formed by reducing PdCl2/SiO2 with KBH4. The results show that PdCl2/SiO2 gives mainly a complicated broad ν(PdCl) bands in the 150–650 cm−1 region…
Resistance to antibiotics is increased in all hospitals, and bacterial pathogens that contaminate burns and wounds are widespread. Their resistance to well-known antibiotics is recorded, and every day resistant isolates are counted and studied. The present study aimed to prepare new polymers with antimicrobial activit…
Binary blends of the sulfonated poly(ether ether ketone) (SPEEK)–poly(ether imide) (PEI) and SPEEK–polycarbonate (PC), and ternary blends of the SPEEK–PEI–PC, were investigated by differential scanning calorimetry. SPEEK was obtained by sulfonation of poly(ether ether ketone) using 95% sulfuric acid. From the thermal…
The dynamic mechanical properties of poly(n-butyl methacrylate) (PBMA) latex films postadded with alkali-soluble resin (ASR) have been studied and compared with those of latex films prepared by emulsion polymerization in the presence of ASR (ASR-fortified latex). The miscibility between PBMA and ASR, poly(styrene/alph…
Polycarbonate (PC) blended with a polymer-modifier polycarbonate–polydimethylsiloxane (PC–PDMS) of polyblock structure having equal molar ratios of soft (PDMS) and hard (PC) blocks have been investigated. The kinetics of adhesional interaction in blends and the analysis of interphase interaction conducted by using the…
The effectiveness of a set of thermally resistant polymers was evaluated for aircraft applications using the cone calorimeter (ASTM E1354/ISO 5660) under heat fluxes simulating real scale fires. This study included eight developmental and commercial thermally resistant polymers available in the literature and/or marke…
Styrene–butadiene rubber (SBR) was treated with decabromobiphenyl oxide (DBBO) and/or aluminum hydroxide [Al(OH)3] as a flame retardant. The flammability of the resulting system was determined by the limiting oxygen index method. The effect of the added flame retardants on the maximum torque (MH), curing rate, and ten…
Selected examples of the Canadian contribution to the development of understanding of the behavior of hydrogen in zirconium alloys are reviewed. To solve the technical problems faced by the nuclear industry, it was necessary to have values for the solubility and diffusivity of hydrogen in the alloys, the diffusivity n…
A number of structurally different block copolymer polyhydroxypolyamides (PHPAs), produced by condensation polymerization of activated aldarates with 1o diamines, were evaluated for their water and methanol solubility and film-forming and adhesive properties. The polymers are composed of a single aldaric acid and a si…