I. Šics、Tiberio A. Ezquerra、Aurora Nogales 等 6 位作者2001-05-23Biomacromolecules
The isothermal crystallization process of a poly(3-hydroxybutyrate-co-3-hydroxyvalerate) copolymer, P(HB-co-HV) with a HB/HV ratio 78/22 was investigated by simultaneous small-angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS), and dielectric spectroscopy (DS). By use of this experimental setup (SWD), w…
Polymer crystallization and propertiesNatural Fiber Reinforced Compositesbiodegradable polymer synthesis and properties
Shuyan Li、Elina Vuorimaa、Helge Lemmetyinen2001-05-23Journal of Applied Polymer Science
Abstract The dynamic, isothermal, and model‐free isoconversional modes of differential scanning calorimetry measurement were used to monitor the curing process of the polyurethane system. Conversions obtained from these three methods were in good agreement with one another, indicating that isothermal and model‐free is…
Polymer crystallization and propertiesEpoxy Resin Curing ProcessesThermal and Kinetic Analysis
Helmut R. Brand、Prabir K. Mukherjee、Harald Pleiner2001-05-23Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The hydrodynamic theory for the smectic-A phase and the isotropic phase is generalized to the macroscopic dynamics in the vicinity of the isotropic-smectic-A phase transition. The macroscopic dynamic equations are presented on the isotropic side as well as on the smectic-A side of the phase transition, incorporating t…
Liquid Crystal Research AdvancementsNonlinear Dynamics and Pattern Formation
Nesrin Kayirhan、Adil Denizli、Nesrin Hasırcı2001-05-23Journal of Applied Polymer Science
Abstract Polyurethanes are a class of polymers that have a wide range of applications in the medical field although their blood compatibility still needs improvement. In order to obtain medical purity, this study prepared membrane‐form polyurethanes from toluene 2,4‐diisocyanate (TDI) and poly(propylene ethylene glyco…
Advanced Sensor and Energy Harvesting MaterialsPolymer Surface Interaction StudiesBlood properties and coagulation
Sanjay Vasudeo Kagwade、Clive R. Clayton、Gary P. Halada2001-05-23Surface and Interface Analysis
Abstract We report on the photoreduction of hexavalent chromium during exposure to soft x‐rays used in x‐ray photoelectron spectroscopy (XPS). Photoreduction of hexavalent chromium to the tetravalent state in both CrO 3 and K 2 CrO 4 was found to involve hydrocarbons adsorbed onto the sample surface during rough pumpi…
X-ray Spectroscopy and Fluorescence AnalysisNuclear Physics and ApplicationsElectron and X-Ray Spectroscopy Techniques
M. Vilfan、Irena Drevenšek‐Olenik、Alenka Mertelj 等 4 位作者2001-05-23Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
Dynamic light scattering was used to measure the azimuthal anchoring energy coefficient W(straight phi) of nematic liquid crystal (5CB) on photoaligning poly-(vinyl-cinnamate) layer. Measurements were repeated several times within two months. The results show that W(straight phi) increases in the first few days after…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsSurfactants and Colloidal Systems
Neil E. Fernandes、Scott M. Fisher、Joseph C. Poshusta 等 6 位作者2001-05-23Chemistry of Materials
Continuous palladium films were synthesized at controlled depths within porous alumina disks by H 2 reduction of organopalladium compounds dissolved in supercritical CO 2 at 60 °C using an opposing reactants deposition geometry. Film position was controlled by adjusting the relative concentrations of H 2 and the palla…
Advanced ceramic materials synthesisHigh-Temperature Coating BehaviorsBlock Copolymer Self-Assembly
Milind V. Kulkarni、Anjali A. Athawale2001-05-23Journal of Applied Polymer Science
Abstract Chemically synthesized polyaniline and its ring substituted derivatives such as poly(o‐toluidine), poly(2,3‐dimethylaniline) and poly(2,5‐dimethylaniline) were utilized as sensors for relative humidity (RH) between 6.4% and 97.3%. The conductivity of the polymers was found to decrease on exposure to RH betwee…
Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors
I. Kotuła、Bernard Marciniak2001-05-23Journal of Chemical & Engineering Data
The solubilities of naphthalene and acenaphthene in six chloro derivative solvents, chloroform, tetrachloromethane, 1,1-dichloroethane, 1,2-dichloroethane, trichloroethylene, and tetrachloroethylene, have been experimentally determined in the temperature range between 288 K and 323 K. This range corresponds to that wh…
Analytical Chemistry and ChromatographyCrystallization and Solubility StudiesChemical and Physical Properties in Aqueous Solutions
Zhaohui WEI、GU Zhen-ya2001-05-23Journal of Applied Polymer Science
Abstract In this study, the synergistic aminolysis (sodium hydroxide and ethylene diamine in one bath) mechanism of polyethylene terephthalate (PET) microfiber crepe fabric was preliminarily investigated. The results showed that not only active groups (i.e., NHR, COOH, and OH) but also considerable cracks and crate…
Dyeing and Modifying Textile FibersTextile materials and evaluationsSilk-based biomaterials and applications
Jeffry A. Kelber、G. Seshadri2001-05-23Surface and Interface Analysis
Abstract Certain adsorbates, particularly sulfur and iodine, present at submonolayer coverages catalyze anodic dissolution or oxidation at selected transition metal surfaces. No change in adsorbate surface coverage or oxidation state is observed during the dissolution process, indicating that the process is truly cata…
Corrosion Behavior and InhibitionSemiconductor materials and devicesConcrete Corrosion and Durability
Christophe Jeandon、Bénédicte Krattinger、Romain Ruppert 等 4 位作者2001-05-23Inorganic Chemistry
The photooxidation of a meso-gem-disubstituted phlorin gave two isomeric biladienones in an equilibrium involving a Z-E double bond photoisomerism. The structures of these bile pigments were elucidated using NMR techniques and show terminal benzoyl and pyrrolone moieties. Complexation with divalent cations (nickel(II)…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesMetal-Catalyzed Oxygenation Mechanisms
Antal Jákli、Geetha G. Nair、C. K. Lee 等 5 位作者2001-05-23Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The transfer of chirality from nonchiral polymer networks to the racemic B2 phase of nonchiral banana-shaped molecules is demonstrated. This corresponds to the transfer of chirality from an achiral material to another achiral material. There are two levels of chirality transfers. (a) On a microscopic level the presenc…
Liquid Crystal Research AdvancementsSynthesis and Properties of Aromatic CompoundsMolecular spectroscopy and chirality
G. A. Melkov、A. A. Serga、V. S. Tiberkevich 等 5 位作者2001-05-23Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
The interaction of a propagating wave packet (carrier frequency $\ensuremath{\omega}$, wave number $k)$ with nonadiabatic parametric pumping, localized in a region of size the order of the carrier wavelength $L\ensuremath{\sim}\ensuremath{\lambda}=2\ensuremath{\pi}/k$, is studied experimentally in a system of dipolar…
Liquid Crystal Research AdvancementsPhotorefractive and Nonlinear OpticsMagneto-Optical Properties and Applications
Shino Yamada、Yi Wang、Naoki Asakawa 等 5 位作者2001-05-23Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCrystalline Structural Change of Bacterial Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) with Narrow Compositional DistributionShino Yamada, Yi Wang, Naoki Asakawa, Naoko Yoshie, and Yoshio InoueView Author Information Department of Biomolecular Engineering, Tokyo Institute of T…
biodegradable polymer synthesis and propertiesEnzyme Structure and Function
A. Patkowski、E. W. Fischer、W. Steffen 等 7 位作者2001-05-23Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
A new feature of glass-forming liquids, i.e., long-range density fluctuations of the order of 100 nm, has been extensively characterized by means of static light scattering, photon correlation spectroscopy and Rayleigh-Brillouin spectroscopy in orthoterphenyl (OTP) and 1,1-di(4(')-methoxy-5(')methyl-phenyl)-cyclohexan…
Material Dynamics and PropertiesThermodynamic properties of mixturesPhotochemistry and Electron Transfer Studies
Sandhya A. M. Duggan、Gary Fallon、Steven J. Langford 等 6 位作者2001-05-23The Journal of Organic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTCrown-Linked Porphyrin SystemsSandhya A. Duggan, Gary Fallon, Steven J. Langford, Vei-Lin Lau, Jacqueline F. Satchell, and Michael N. Paddon-RowView Author Information School of Chemistry, Monash University, Clayton, Victoria, Australia 3800, and School of Chemistry, University…
Porphyrin and Phthalocyanine ChemistryMetal-Catalyzed Oxygenation MechanismsSurface Chemistry and Catalysis
Tao Li、C.N. Ng、Robert K.Y. Li2001-05-23Journal of Applied Polymer Science
Abstract The instrumented Izod and Charpy tests were performed on the sawdust–polypropylene (PP) composites to study the nature of impact resistance in the thermoplastic wood composites. The notched Izod strength was found to increase with filler content in composites containing the Maleic–anhydride–grafted PP (MAPP)…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesNatural Fiber Reinforced Composites
Tae‐Woo Lee、O. O. Park、Jang‐Joo Kim 等 5 位作者2001-05-23Chemistry of Materials
The potential use of polymer light-emitting devices is ultimately limited by their low quantum efficiency as well as by their poor stability against oxygen and moisture. To simultaneously solve these drawbacks, light-emitting devices using the polymer/layered silicate nanocomposite with good gas-barrier properties wer…
Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchConducting polymers and applications
Tina Liebe、Paul Steinmann2001-05-23International Journal for Numerical Methods in Engineering
Abstract The paper presents the theory and the numerics of a thermodynamically consistent formulation of gradient plasticity at small strains. Starting from the classical local continuum formulation, which fails to produce physically meaningful and numerically converging results within localization computations, a the…
Composite Structure Analysis and OptimizationComposite Material MechanicsNonlocal and gradient elasticity in micro/nano structures