Measurements of the Magnetic Permeabilities of the Iron-Manganese Alloy System Prepared by the Methods of Powder Metallurgy

Powder metallurgy is a branch of metallurgy which produces metallic compacts in their final forms by means of pressure and heat-treatment from the pow­ders. The products of powder metallurgy are being used in our daily lives quite often. For example, the tungsten wires in the electric bulbs to the silver-tin fillings of our teeth

pH degradable dendron-functionalized poly(2-ethyl-2-oxazoline) prepared by a cascade 'double-click' reaction

In this study, we report on the synthesis of a dendron-functionalized poly(2-ethyl-2-oxazoline) in a one-pot cascade reaction approach. By means of a bifunctional small organic compound linker, namely (9-azidomethyl)anthracene, alkyne-functionalized PEtOx and maleimide-substituted dendron were coupled in a one-pot cascade approach exploiting the copper-catalyzed azide-alkyne cycloaddition (CuAAC) and the Diels-Alder cycloaddition. The resulting amphiphilic block copolymer was characterized by size-exclusion chromatography (SEC), proton nuclear magnetic resonance (H-1 NMR) spectroscopy and matrix-assisted laser desorption ionization time-of-flight (MALDI TOF) mass spectrometry (MS). Since the dendron contains acid-labile acetal protecting groups, it is pH responsive and the hydrophilicity significantly increases upon hydrolysis. The aqueous solution behavior and pH-responsivity of the PEtOx-dendron are discussed at neutral pH as well as acidic pH based on dynamic light scattering and fluorescence spectroscopy

Synthesis and Functionalization of Thiol-Reactive Biodegradable Polymers

Synthesis and Functionalization of Thiol-Reactive Biodegradable Polymer