P. P. Lizymol、Sabu Thomas、M. Jayabalan1997-09-01Polymer International
The enhancement of miscibility at the lower critical solution temperature (LCST) of the blends poly(vinyl chloride)/poly(ethylene-co-vinyl acetate) (PVC/EVA), poly(vinyl chloride)/poly(styrene-co-acrylonitrile) (PVC/SAN) and poly(vinyl chloride)/poly(ethylene-co-vinyl acetate)/poly(styrene-co-acrylonitrile) (PVC/EVA/S…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesPolymer Science and PVC
Anand Yethiraj、John Bechhoefer1997-09-01Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals
We present a new, extremely sensitive optical method to study the nematic-smectic-A (NA) phase transition in liquid crystals. In this new technique, we monitor nematic director fluctuations as a function of temperature as we approach the NA transition. We show that the NA transition in the liquid crystal 8CB (which ha…
Liquid Crystal Research AdvancementsNonlinear Dynamics and Pattern Formation
Robert Boyd、J. P. S. Badyal1997-09-01Macromolecules
Oxidative low-pressure and atmospheric plasma modification of polystyrene/poly(2,6-dimethyl-1,4-phenylene oxide) miscible polymer blend surfaces has been studied using X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). The extent and stability of surface oxygenation is found to be critically dep…
Surface Modification and SuperhydrophobicityPlasma Applications and DiagnosticsElectrohydrodynamics and Fluid Dynamics
K. S. Ghosh、S. N. Maiti1997-09-01Polymer-Plastics Technology and Engineering
The melt rheological properties of titanate coupling-agent-treated particulate silver powder (varying from 0 to 5.6 vol% of Ag) were investigated. The effect of filler concentration on shear stress, shear rate, melt viscosity, and melt elasticity parameters were determined by using a piston-type capillary rheometer. T…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesPolymer Foaming and Composites
W. Bronger、Bernd Lenders、J. Huster1997-09-01Zeitschrift für anorganische und allgemeine Chemie
Abstract BaAg 2 S 2 wurde als kristallines Pulver bei der Umsetzung von Barium‐bis[dicyanoargentat(I)] im Schwefelwasserstoffstrom bei 500°C erhalten. Einkristalle entstanden in einer evakuierten Glasampulle, in der das pulverförmige BaAg 2 S 2 mit Kaliumrhodanid als Flußmittel bei 480°C erhitzt wurde. BaAg 2 S 2 kris…
Crystal Structures and PropertiesIron-based superconductors researchInorganic Chemistry and Materials
I Alibert、C. Coulon、A. M. Bellocq 等 4 位作者1997-09-01Europhysics Letters (EPL)
We discuss in this letter the dilute part of the phase diagram of the pseudo-ternary system (brine + glycerol), SDS, hexanol through Freeze Fracture Electron Microscopy (FFEM) and dielectric measurements. The main conclusion is the observation of a large one-phase domain L * instead of an L 4 phase as usually found in…
Material Dynamics and PropertiesSurfactants and Colloidal SystemsThermodynamic properties of mixtures
Qionghua Shen、Leonard V. Interrante1997-09-01Macromolecules
A homologous series of poly( n -alkylmethylsiloxanes), [SiMe(R)O] n, were prepared by cationic ring-opening polymerization (ROP) of cyclotrisiloxanes containing n -alkyl substituents, such as C 2 H 5, n -C 3 H 7, n -C 4 H 9, n -C 5 H 11, and n -C 6 H 13, on the Si. The resultant polymers were characterized by NMR, GPC…
Polymer Nanocomposites and PropertiesSynthesis and characterization of novel inorganic/organometallic compoundsSilicone and Siloxane Chemistry
Alexei Boulbitch1997-09-01Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
A possibility of the formation a self-contained cylindrical lattice under crystallization of proteins due to the anisotropic (trapezoidal) shape of their globules is discussed theoretically. The theory of cylindrical crystallization is considered. It is shown that in this case the list of the low-symmetry phases is co…
Protein Structure and DynamicsEnzyme Structure and Functionnanoparticles nucleation surface interactions
Johannes Beck、Martin Kasper、Alexander Stankowski1997-09-01Chemische Berichte
Abstract The reaction of Te, TeX 4 and BiX 3 [X = Cl, Br] in sealed, evacuated glass ampoules in the temperature range 170° 100°C yields a variety of compounds composed of tellurium polycations and halobismutate anions. Two of these have been identified by crystal structure analyses as Te 4 [Bi 6 Cl 20 ] (triclinic, P…
Luminescence Properties of Advanced MaterialsCrystal Structures and PropertiesSolid-state spectroscopy and crystallography
A. Nazarboland、R. Elliott1997-09-01International Journal of Cast Metals Research
Measurements of the solute distribution between nodules and of the tensile properties at two different levels in a 25 mm keel block of a ductile iron of composition 3.39%C, 2.56%Si, 0.25%Mo, 0.29%Cu and 0.37%Mn after hipping and austempering and after austempering at 375 °C are reported. A significant drop in tensile…
Microstructure and Mechanical Properties of SteelsMetallurgy and Material FormingMetal Alloys Wear and Properties
Ajoy K. Manna、P. P. De、D. K. Tripathy 等 5 位作者1997-09-01Rubber Chemistry and Technology
Abstract This study—based on Monsanto Rheometer measurements, determination of bound rubber, enthalpy of reaction, solvent swelling studies, and measurement of physical properties— revealed that the functional groups of intermediate super abrasion furnace (ISAF) carbon black chemically interact with the epoxidized nat…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesTribology and Wear Analysis
Jane Maria Gonçalves Laranjeira、W.M. de Azevêdo、Mário César Ugulino de Araújo1997-09-01Analytical Letters
A simple conductimetric system to determine ammonia concentration using a sensor based on a conductor polymer was developed. The sensitive element to ammonia is a thin polyaniline film deposited by chemical synthesis in an acrylic substrate prepared before hand with two graphite electrodes. The conductance of the poly…
Electrochemical sensors and biosensorsConducting polymers and applicationsAnalytical Chemistry and Sensors
Mark R. Wardell、Richard Skinner、D C Carter 等 5 位作者1997-09-01Acta Crystallographica Section D Biological Crystallography
Crystals of antithrombin were grown both on earth and in microgravity aboard US Space Shuttle Flight STS-67. The quality of crystals grown in both environments was highly variable and many could not be indexed. The microgravity crystals, however, generally diffracted better, as demonstrated by a novel procedure that e…
Enzyme Structure and FunctionCalcium Carbonate Crystallization and InhibitionCrystallization and Solubility Studies
Brian J. Tighe、Allan J. Amass、Mohammed Yasin1997-09-01Macromolecular Symposia
Abstract We have found, within the polyester family, interesting and potentially useful patterns of three‐component compatibility. The bacterially produced biodegradable polyester, poly(hydroxybutyrate) (PHB) and its copolymers with hydroxyvalerate (HV) together with polymers such as cellulose acetate butyrate (CAB),…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and properties
M. Fanciulli1997-09-01Philosophical Magazine B
Electron paramagnetic resonance (EPR) has been used to investigate defects in hexagonal boron nitride (BN), polycrystalline cubic BN, BN and BN: C films produced by reactive sputtering. The dominant paramagnetic centre is attributed to the N vacancy. The Epr relaxation parameters have been deduced from the saturation…
Graphene research and applicationsDiamond and Carbon-based Materials ResearchBoron and Carbon Nanomaterials Research
Akira Inaba1997-09-01Japanese Journal of Applied Physics
The heat capacity for wurtzite-type BN has been determined between 50 and 300 K. The difference from that of zinc blende-type BN, which was also measured between 15 and 300 K, indicates that the interatomic force constants of the wurtzite-type lattice are generally 4% weaker than those of the zinc blende-type one. Thi…
Advanced ceramic materials synthesisThermal properties of materialsBoron and Carbon Nanomaterials Research
M. A. Dominguez-Cortazar、Jean-Pierre Franc、Jean-Marie Michel1997-09-01Journal of Fluids Engineering
The erosive efficiency of cavitating vortices is well known, although its exact mechanism has not been clarified. In order to bring fundamental information to the subject, a new device called “Cavermod” was designed in which axial collapse of a cavitating vortex is produced. We consider in this paper the design princi…
Cavitation Phenomena in PumpsFluid Dynamics and Heat TransferUltrasound and Cavitation Phenomena
Tetsuya Asano、Mayo Uenoyama、Keiichi Moriya 等 6 位作者1997-09-01Liquid Crystals
A new series of 2-(4- n -alkoxyphenyl)-5-(4-methylphenyl)pyridines (CH C H C H NC HOC H, n 1-10) (APMPP), which are teraryl compounds containing a pyridine ring in n 2 m 1 the centre position of the rigid core, was synthesized and the phase transitions of the homologues were studied using DSC measurements, polarizing…
Liquid Crystal Research AdvancementsMolecular spectroscopy and chiralityAxial and Atropisomeric Chirality Synthesis
V.Yu. Levin、S. H. Kim、А. I. Isayev1997-09-01Rubber Chemistry and Technology
Abstract Sulfur-cured non-reinforced SBR with different amounts of poly-, di- and monosulfidic crosslinks is devulcanized by high power ultrasound irradiation in a continuous process under various processing conditions. Total crosslink density, the proportion of polysulfidic crosslinks, gel fraction, and glass transit…
Synthesis and properties of polymersSilicone and Siloxane ChemistryPigment Synthesis and Properties
Stuart Cook、Paul E. F. Cudby、R. T. Davies 等 4 位作者1997-09-01Rubber Chemistry and Technology
Abstract An electron microscopy technique which has been used to visualize the crosslinked regions in vulcanized blends of dry rubber has now been applied to films made from natural rubber (NR) latex. The method involves swelling the latex film with styrene, polymerizing the styrene, sectioning the sample and then sta…
Polymer Nanocomposites and PropertiesPolymer composites and self-healingLubricants and Their Additives