Ibrahim Abdelhalim Ahmed、R. Blachnik、G. Kästner 等 4 位作者2001-09-01Zeitschrift für anorganische und allgemeine Chemie
The phase diagram of the system [Ph4P]Br/BiBr3 was investigated with the aid of DSC, TG and temperature dependent X-ray powder diffraction measurements. By varying the reaction conditions, stoichiometry and crystallisation conditions of the reaction between BiBr3 and [Ph4P]Br four polynuclear bromobismuthates are form…
Crystallography and molecular interactionsSolid-state spectroscopy and crystallographyInorganic Chemistry and Materials
Norman S. Allen、Luis J. Enriquez、Michèle Edge 等 6 位作者2001-09-01Journal of Vinyl and Additive Technology
Abstract The influence of zinc stearate (ZnSt) on the thermal and photochemical stabilities of phenolic antioxidant/phosphite combinations has been determined in HDPE by using FTIR analysis. The results show that while under thermal aging the effects are generally antagonistic, under photooxidation the effects are syn…
Nanocomposite Films for Food PackagingMicroplastics and Plastic PollutionPolymer Science and PVC
Ye Tian、P. Buriak、S. R. Eckhoff2001-09-01Cereal Chemistry
ABSTRACT The relationships between expansion volume and physical properties of three varieties of popcorn kernels were investigated on a single kernel basis. Physical properties studied were kernel size, kernel sphericity, and kernel density. Methods of measuring densities and popped volumes of individual popcorn kern…
Food composition and propertiesNatural Fiber Reinforced CompositesAgricultural Engineering and Mechanization
Anthony Mercier、Hervé Deleuze、Oliver Mondain-Monval2001-09-01Macromolecular Chemistry and Physics
This paper reports the preparation of an emulsion-derived foam with pendant vinylbenzene groups, called (vinyl)polystyrene polyHIPE. Thiols, HSR, underwent regioselective anti-Markovnikov addition to the residual vinyl groups in the presence of free-radical azo initiators, leading to a wide range of functional polyHIP…
Advanced Polymer Synthesis and CharacterizationSurfactants and Colloidal SystemsPickering emulsions and particle stabilization
Asli Isig r-Ergüdenler Filiz Karaosmanog lent D. C ̧ift2001-09-01Energy Sources
Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) techniques were used to investigate the kinetics of thermochemical conversion of an agricultural residue, namely the straw and stalk of rapeseed plants. The thermal degradation characteristics and the kinetic parameters (order of reaction, activa…
Thermochemical Biomass Conversion ProcessesThermal and Kinetic Analysis
Chansun Shin、Marc Fivel、David Rodney 等 6 位作者2001-09-01Journal de Physique IV (Proceedings)
The structure and strength of three-dimensional Lomer-Cottrell junctions are studied using four different models. These models represent increasing levels of sophistication, with each case including some new physical effect. The line tension approximation makes use only of the elastic self energy of the dislocation li…
Microstructure and mechanical propertiesAluminum Alloy Microstructure PropertiesIntermetallics and Advanced Alloy Properties
Takabumi Nagai、Kazuhisa Fujii、Ikuko Takahashi 等 4 位作者2001-09-01Bulletin of the Chemical Society of Japan
Abstract Trifluoromethyl (CF3)-substituted donor–acceptor norbornadiene (NBD) derivatives were synthesized. The photoisomerization of CF3-NBD derivatives proceeded smoothly. The thermal stability of quadricyclane (QC) derivatives obtained from CF3-NBD derivatives was examined, and it was found that the CF3 group incre…
Radical Photochemical ReactionsLuminescence and Fluorescent MaterialsPhotochromic and Fluorescence Chemistry
Weidong Xiao、Peixin He、HU Gao-ping 等 4 位作者2001-09-01Journal of Fire Sciences
The effect of hydrated alumina and triphenyl phosphate on the flame-retardance and thermal stability of the acid anhydride-cured epoxy resin was studied by thermogravimetry and limiting oxygen index determination. The results show that both the hydrated alumina and triphenyl phosphate act as flame-retardants for epoxy…
Epoxy Resin Curing ProcessesFlame retardant materials and propertiesSynthesis and properties of polymers
Arif Daştan、Nurullah Saraçoğlu、Metin Balcı2001-09-01European Journal of Organic Chemistry
Photooxygenation of the cycloheptatriene derivative 9 gave the bicyclic endoperoxide 14. Cleavage of the peroxide linkage in 14 with thiourea resulted in the formation of 16. Treatment of the endoperoxide 14 with a catalytic amount of triethylamine provided a new isomer of stipitatic acid 11, and 16. Pyrolysis or the…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesOxidative Organic Chemistry Reactions
Og uz Mecit、Ahmet Akar2001-09-01Macromolecular Materials and Engineering
Waste poly(ethylene terephthalate) was depolymerized by glycolysis to obtain hydroxyl-terminated oligomers. The effect of depolymerization temperature, the type of glycol and the amount of catalyst on the yield and the composition of the products were studied. The hydroxyl-terminated oligomers obtained from the glycol…
Polymer crystallization and propertiesbiodegradable polymer synthesis and propertiesPolymer composites and self-healing
Toshio Ogawa2001-09-01Japanese Journal of Applied Physics
The domain switching and rotation in barium titanate ceramics were evaluated by investigating the poling field dependence of the ferroelectric properties. The effect of domain clamping on the planar coupling factor and dielectric constant at the coercive field was confirmed in barium titanate ceramics as well as in th…
Ferroelectric and Piezoelectric MaterialsGlass properties and applicationsAcoustic Wave Resonator Technologies
Yeong‐Deuk Shin、Jun‐Hwan Ahn、Jae‐Suk Lee2001-09-01Macromolecular Rapid Communications
A chiral polyisocyanate, poly[6-{1-[(S)-(–)-2-methylbutyl]oxycarbonylamino}hexyl isocyanate], was synthesized using sodium diphenylmethanide and sodium naphthalenide as unidirectional and bidirectional initiators, respectively, via anionic polymerization in THF at –98°C. NaBPh4 as a common ion salt was used to produce…
Photochromic and Fluorescence ChemistryMolecular spectroscopy and chiralityAxial and Atropisomeric Chirality Synthesis
Kazunari Maki、Nobuyuki Soyama、Kaoru Nagamine 等 5 位作者2001-09-01Japanese Journal of Applied Physics
We have studied the crystallization of sol-gel derived Pb(Zr 0.4 Ti 0.6 )O 3 [PZT(40/60)] thin films at 435 down to 420°C. The PZT(40/60) films were prepared at these temperatures on Pt/SiO 2 /Si substrates by a combination of diol-based solutions and modified film preparation processes. Various properties of the PZT(…
Ferroelectric and Piezoelectric MaterialsDielectric materials and actuatorsMicrowave Dielectric Ceramics Synthesis
C. Weibetabacker2001-09-01QJM
A feasible electrostatic corrector (ECO) is outlined and the principle of the electrostatic correction is elucidated by means of a light-optical analogue. The ECO compensates for the chromatic and the spherical aberration of charged-particle lenses and reduces the resolution limit of a special LVSEM (low-voltage scann…
Advanced Electron Microscopy Techniques and ApplicationsAdvancements in Photolithography TechniquesElectron and X-Ray Spectroscopy Techniques
Seung Hee Lee、Seung Ho Hong、Jin Mahn Kim 等 5 位作者2001-09-01Journal of the Society for Information Display
Abstract— Several TFT‐LCD devices exhibiting high image quality have been developed and commercialized, overcoming the narrow viewing‐angle characteristics of conventional twisted‐nematic (TN) devices. Nevertheless, no single device dominates large‐sized TFT‐LCDs. In this paper, the product issues of existing LC devic…
Liquid Crystal Research AdvancementsAdvanced optical system designElectrowetting and Microfluidic Technologies
Zaihua Liu2001-09-01Acta Geologica Sinica - English Edition
Abstract The conversion of CO 2 into H + and is a relatively slow reaction. Hence, its kinetics may be rate determining in carbonate rock dissolution. Carbonic anhydrase (CA), which is widespread in nature, was used to catalyze the CO 2 conversion process in dissolution experiments of limestone and dolomite. It was fo…
Diamond and Carbon-based Materials ResearchMethane Hydrates and Related PhenomenaEnzyme function and inhibition
Radu Bacaloglu、Ulrich Stewen2001-09-01Journal of Vinyl and Additive Technology
Abstract A computer scanning procedure for the determination of total double‐bond concentration resulting from PVC degradation is described. It is fast, fully automated, and has a very high sensitivity (5 ppm of degraded monomer units). This high sensitivity makes possible the monitoring of discoloration on a very sma…
Inorganic and Organometallic ChemistryThermal and Kinetic AnalysisPolymer Science and PVC
Kim K. de Groh、Joyce A. Dever、James K. Sutter 等 7 位作者2001-09-01High Performance Polymers
Metallized Teflon® fluorinated ethylene propylene (FEP) thermal control material on the Hubble Space Telescope (HST) is degrading in the space environment. Teflon® FEP insulation was retrieved during servicing missions, which occurred in 1993, 1997 and 1999. During the second servicing mission (SM2), the 5 mil alumini…
Silicone and Siloxane ChemistrySpacecraft Design and TechnologySpacecraft and Cryogenic Technologies
Weilin Xu、Tien‐Wei Shyr2001-09-01Textile Research Journal
1,2,3,4-Butanetetracarboxylic acid (BTCA) is confirmed to be an effective crosslinking agent with sodium hypophosphate (SHP) catalyst for washing durability improvement of cotton fabrics treated with fluorocarbon resin. By FTIR analysis, hydroxyl groups (—OH) are confirmed as a water repellency agent, so the resin can…
Dyeing and Modifying Textile FibersTextile materials and evaluations
Lisete Cristine Scienza、G.E. Thompson2001-09-01Polímeros
Polypyrrole films were generated on high purity aluminum substrates under anodic polarization from aqueous electrolytes comprised of pyrrole and sodium dodecylbenzene sulfonate. The methods employed to characterize the polymer films included scanning electron microscopy, Fourier-transform infrared and X-photoelectron…
Advanced Sensor and Energy Harvesting MaterialsConducting polymers and applicationsAnalytical Chemistry and Sensors