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The Society’s Site: Time period September 2004 to February 2005

Rheology of Disperse Systems

Patents

Ferrofluids: Magnetically Controllable Fluids and Their Applications

Kinetic and thermodynamic considerations in the synthesis of a new three‐arm poly(ε‐caprolactone)

Abstract A new high‐molecular‐weight three‐arm poly(ε‐caprolactone) (PCL) polymer was synthesized in bulk (in the absence of any solvent) by using aluminum tri‐sec butoxide as a tri‐functional initiator. The ring‐opening polymerization of ε‐caprolactone occurs via a coordination‐insertion mechanism that links three gr…

Direct Organocatalytic Ring‐Opening Polymerizations of Lactones

Abstract We have developed a novel organocatalytic, direct synthesis of aliphatic polyesters. The synthesis was based on a novel direct organic acid‐catalyzed living ring‐opening polymerization (ROP) of ε‐caprolactone and δ‐valerolactone with benzyl alcohol as the initiator. The organic acid‐catalyzed ROPs were perfor…

Secondary austenite and chromium nitride precipitation in simulated heat affected zones of duplex stainless steels

Primary and secondary intragranular austenite precipitation and its relationship with chromium nitride (Cr 2 N) were studied in a simulated multipass heat affected zone (HAZ) of five duplex stainless steel alloys (UNS S32304, S32205, S32550, S32750, and S32760). The Gleeble thermal-mechanical simulator was used to per…

Recycled poly(ethylene terephthalate) chain extension by a reactive extrusion process

Abstract A commercial‐scale reactive extrusion processing system for recycled poly(ethylene terephthalate) (PET) flakes with an added chain extender, pyromellitic dianhydride (PMDA), was investigated. The PMDA concentration was varied with the intention of reaching a higher recycled PET intrinsic viscosity ([η]). The…

Sisal Fiber/Glass Fiber Hybrid Composites: The Impact and Compressive Properties

The variations of impact strength and compressive strength of unsaturated polyester based sisal/glass hybrid composites with fiber loading have been studied. The impact strength of these hybrid composites has been found to be higher than that of the matrix, whereas a marginal decrease was observed in the compressive s…

Review of the synthesis of layered double hydroxides: a thermodynamic approach

The synthesis of layered double hydroxides (LDHs) by hydrothermal-LDH reconstruction and coprecipitation methods is reviewed using a thermodynamic approach. A mixture model was used for the estimation of the thermodynamics of formation of LDHs. The synthesis and solubility of LDHs are discussed in terms of standard mo…

The Use of Molecular Probes for the Characterization of Nanoporous Adsorbents

Abstract Molecular probes can be employed in three different ways for the characterization of nanoporous adsorbents. The simplest approach is to use a range of globular nonpolar molecules of different diameter in order to assess the effective size of the pore entrances in a molecular sieve. For this purpose, conventio…

Fragilaria and Staurosira (Bacillariophyceae) from sediment surfaces of 40 lakes in the Austrian Alps in relation to environmental variables, and their potential for palaeoclimatology

The percentage distributions of Fragilaria and Staurosira taxa in surface sediment samples from 40 oligo- to ultra-oligotrophic, pH neutral to alkaline, mountain lakes of the central Austrian Alps (Niedere Tauern) were studied in relation to environmental variables using multivariate statistics. Selected taxa that wer…

XPS study of the atmospheric corrosion of copper alloys of archaeological interest

Abstract XPS analysis of different forms of copper sulfate, including antlerite, brochantite, posnjakite, chalcanthite and anhydrous copper sulfate, as well as pure copper and its oxides cuprite and tenorite, was carried out. These products most often occur when dealing with atmospheric corrosion of copper and bronze…

Efficient oxidations and photooxidations with molecular oxygen using metal phthalocyanines as catalysts and photocatalysts

Metal phthalocyanines can be very efficient as catalysts and photocatalysts in oxidation reactions using molecular oxygen as oxidant. Different types of soluble low molecular weight or oligomeric and insoluble heterogeneous catalysts and photocatalysts were developed. The heterogeneous metal phthalocyanines exist eith…

Spin and Orbital Magnetic Moments of Fe_{3}O_{4}

We present measurements of the spin and orbital magnetic moments of ${\mathrm{F}\mathrm{e}}_{3}{\mathrm{O}}_{4}$ by using SQUID and magnetic circular dichroism in soft x-ray absorption. The measurements show that ${\mathrm{F}\mathrm{e}}_{3}{\mathrm{O}}_{4}$ has a noninteger spin moment, in contrast to its predicted ha…

ZnO Clusters Encapsulated inside Micropores of Zeolites Studied by UV Raman and Laser-Induced Luminescence Spectroscopies

Using microporous zeolites as host, sub-nanometric ZnO clusters were prepared in the micropores of the host by the incipient wetness impregnation method. A small amount of sub-nanometric ZnO clusters were introduced into the channels of HZSM-5 zeolite, whereas a large quantity of sub-nanometric ZnO clusters can be acc…

Dialysis‐associated systemic fibrosis (nephrogenic fibrosing dermopathy): Study of inflammatory cells and transforming growth factor β1 expression in affected skin

OBJECTIVE: Nephrogenic fibrosing dermopathy (NFD) is a newly recognized cutaneous fibrotic disorder occurring in individuals with end-stage renal disease (ESRD). The aim of the present study was to describe the clinical and histopathologic features of 9 new cases and to characterize the inflammatory cells and expressi…

XPS MultiQuant: multimodel XPS quantification software

Abstract A program for quantitative evaluation of x‐ray photoelectron spectra has been developed to serve as a practical tool for surface chemists. The program uses the ‘classic’ approach of quantification and requires as input the integrated intensities of the measured XPS lines. The usual correction methods and fact…

Reproducible XPS on biopolymers: cellulose studies

Abstract The development of ‘user‐friendly’ surface analytical instrumentation has expanded the application of x‐ray photoelectron spectroscopy (XPS) towards softer and more complex composite materials. However, the knowledge of fundamental phenomena in practical, interdisciplinary applications is dearly needed. In th…

Effect of Plasticizers on Mechanical and Barrier Properties of Rice Starch Film

Abstract The effect of plasticizers, glycerol, sorbitol and poly(ethylene glycol) 400 (PEG 400), on mechanical and barrier properties of rice starch film has been investigated. Sorbitol‐ and glycerol‐plasticized starch films appeared homogeneous, clear, smooth, and contained less insoluble particles compared to unplas…