Materials Literature
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Article Statistical and true symmetry of ferrierite: possible absence of straight Τ—Ο—Τ bridging bonds was published on August 1, 1987 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 178, issue 1-4).
We report the first observation on the ‘Lehmann rotation’ of the director configuration of flat cholesteric drops subjected to a DC electric field. This allows us to determine both the sign and the magnitude of the electromechanical coupling coefficient νE of the chiral liquid crystal, which is ≃ −2 × 10−5 q in cgs un…
Friction-spinning of staple-fibre yarns involves the supply of separated fibres to a torque zone within a shear field and the removal of yarn from it. The shear field is created by the movement of one or more solids of revolution. Usually, two parallel cylinders rotating in the same direction and in close proximity ar…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTitration of poly(acrylic acid) and poly(methacrylic acid) in methanolHerbert Morawetz and Yongcai WangCite this: Macromolecules 1987, 20, 1, 194–195Publication Date (Print):January 1, 1987Publication History Published online1 May 2002Published inissue 1 January 1987https://…
The spontaneous polarization was measured for two chemically isomeric ferroelectric smectogens that have different phase sequences. The two compounds, S-4-(3,‘7’-dimethyloctyloxy) phenyl 4-n-decyloxybenzoate and S-4-n-decyloxyphenyl 4-(3,‘7’-dimethyloctyloxy) benzoate differ only in the direction of the central ester…
Thermolysis of the Zn and Cd thiolato compounds [M(SMe)2]n(M = Zn, Cd) gave the metal sulphide, MS, with evolution of MeSMe.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex formation between copper(II) and poly(N-methacryloyl-L-asparagine)Abdennbi Lekchiri, Joelle Morcellet, and Michel MorcelletCite this: Macromolecules 1987, 20, 1, 49–53Publication Date (Print):January 1, 1987Publication History Published online1 May 2002Published inis…
The performance of the QCM impactor (Model 3000, California Measurements, Sierra Madre, CA) has been evaluated at inlet pressures of 59 and 88 Torr, corresponding to the conditions of stratospheric sampling aboard the U-2 aircraft. Impactor mass flow rates and stage operating pressures were measured as a function of i…
An octa-alkylsubstituted derivative of dihydroxo-tin(IV) phthalocyanine is shown to form columnar liquid crystals; polycondensation of the dihydroxo-tin(IV) derivative leads to a spinal columnar mesophase by formation of oxystannyl links between the macrocyclic units.
The adsorption of pyronin Y by montmorillonite and laponite has been studied by visible, infrared and X-ray diffraction spectroscopies. The saturation point is much higher in montmorillonite, being 100 and 41 mmol pyronin per 100 g montmorillonite and laponite, respectively. The adsorbed cationic dye is located in the…
(1987). Review of structure and mobility in amorphous polymers. Critical Reviews in Solid State and Materials Sciences: Vol. 13, No. 3, pp. 259-277.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBifunctional rhodium-oxometalate catalystsA. R. Siedle, C. G. Markell, P. A. Lyon, K. O. Hodgson, and A. L. RoeCite this: Inorg. Chem. 1987, 26, 2, 219–220Publication Date (Print):January 1, 1987Publication History Published online1 May 2002Published inissue 1 January 1987ht…
Complexes [M (NO3)3L1]{M = La or Ce, L1= 2,7,13,18-tetramethyl-3,6,14,17,23,24-hexa-azatricyclo[17.3.1.18,12]tetracosa-1 (23),2,6,8,10,12(24),13,17,19,21-decaene}, [M(NO3)2L1(H2O)]NO3·H2O (M = La, Ce, or Pr), and [{M(NO3)L1(H2O)2}2]NO3[ClO4]3·4H2O (M = Nd, Sm, Eu, Gd, Tb, Dy, Ho, or Er) have been synthesised by a temp…
Synthese anodique et comportement electrochimique de polyfluorenes disubstitues sur l'atome de carbone n o 9. Dopage reversible n ou p sans destruction du materiau. Mise en evidence d'une charge remanente (positive ou negative) dans la matrice polymerique et conditions d'obtention de la neutralisation plus ou moins to…
Hornreich et al. predicted that blue phases I, II, or III should undergo structural transformations into anisotropic uniaxial blue phases in electric or magnetic fields. It is shown here that, besides a hexagonal blue phase BP ${H}^{3\mathrm{D}}$ discovered previously, a novel blue phase, called BP X, can be obtained…
The effect of two diphosphonates, ethane-1-hydroxy-1, 1-diphosphonic acid (EHDP) and 1,2-dihydroxy-1,2-bis(dihydroxyphosphonyl)ethane (DDPE) on the precipitation of calcium carbonate has been investigated. EHDP and DDPE were found to reduce markedly the rate of crystallization at solution concentrations as low as 10–7…
Under optimum conditions, Cu2+-exchanged FeZSM5 catalyses the oxidation of methane by nitrous oxide with high selectivity for methanol production. H+-Exchanged FeZSM yields mainly carbon oxides.
Bacterial poly(3-hydroxybutyrate-co-3-hydroxyvalerate) esters with a wide range of compositions (0–90 mol % 3-hydroxyvalerate units) have been isolated from Alcaligenes eutrophus grown in nitrogen-free culture media containing pentanoic acid and glucose.
The columnar liquid crystalline structure of terephthal-bis-<4-(3',4',5'-triheptyloxybenzoyloxy)-aniline> has been studied using dilatometry and X-ray diffraction. It corresponds to the stacking of the rodlike phasmidic molecules in columns. These are arranged according to a two-dimensional hexagonal lattice.
Abstract Amorphous hydrogenated silicon carbide (a‐SiC:H) films are prepared by magnetron sputtering of crystalline silicon in an argon—hydrogen—methane atmosphere. The specific absorption modes (wagging, rocking, deformation, stretching) of the SiC, (CH m ) n C/Si( n = 1, 2, 3; m = 2, 3), and SiH m −( m = 1,2) grou…