Nanoparticles of coordination polymer [Co2(pydc)2(H2O)6]n.2n H2O [H2pydc = pyridine-2,5-dicarboxylic acid] have been synthesized by sonochemical method and characterized by elemental analysis, infrared spectroscopy, powder X-ray diffraction, scanning electron microscopy, DLS particle size analysis and TGA/DTA. The structure of single crystalline coordination polymer developed from nanosized coo...

One of the newest of viscoelastic RANS turbulence models for drag reducing channel flow with polymer additives is studied in different flow and rheological properties. In this model, finitely extensible nonlinear elastic-Peterlin (FENE-P) constitutive model is used to describe the viscoelastic effect of polymer solution and turbulence model is developed in the k-ϵ-(ν^2 ) ̅-f framework. The geome...

Polymer quantum systems are mechanical models quantized similarly as loop quantum gravity. It is actually in quantizing gravity that the polymer term holds proper as the quantum geometry excitations yield a reminiscent of a polymer material. In such an approach both non-singular cosmological models and a microscopic basis for the entropy of some black holes have arisen. Also important physical ...

1. Macromolecules and Polymers 2. Synthesis of Polymers 3. Structure of Macromolecules 4. Structure of Polymers 5. Design of Polymers with Specific Properties 6. Mechanical Properties of Polymers 7. Rheology and Viscoelasticity of Polymers 8. Electric and Optical Properties of Polymers 9. Additives 10. Polymer Processing 11. Polymers and the Environment 12. Methods of Polymer Characterization 1...

a convenient, one-pot method for the synthesis of diazonium salt has been developed by the sequential diazotization of aromatic amines with nano2, polymer- supported periodic acid (ppia) and 2-naphthole under solvent-free conditions at room temperature. by using this method, several types of aromatic amine, containing electron-withdrawing and electron-donating groups, were rapidly converted to ...

Polymer-Elektrolyt-Membran-Brennstoffzellen (PEMBZ) sind in der Lage, die chemische Energie von Wasserstoff direkt in elektrische Energie unter Nutzung des Luftsauerstoffs zu wandeln. Für den Betrieb von PEMBZ-Systemen existieren verschiedene Möglichkeiten der Zufuhr und Nutzung des eingesetzten Wasserstoffs. Eine Möglichkeit ist der Rezirkulationsbetrieb. Hierbei wird der nicht verbrauchte Was...

nanosized metal oxides dispersed polymer composites constitute a fascinating class of polymer composite materials. synthesis of such composite materials through solvent casting enhances the polymer synthetic technology. solvent casting method was used to prepare cobalt oxide (co3o4) dispersed poly (methyl methacrylate) (pmma) nano composite. x-ray diffraction tool is used to know the structural...

background: the purpose of this study was to evaluate the dependency of magica polymer gel dosimeter response (r2) on different electron energies as well as on different mean dose rate for a standard clinically used linear accelerator. materials and methods: the sensitivity of the dosimeter was represented by the slope of calibration curve in the linear region measured for each modality. a cali...

this study aimed at determining the effect of domestic synthesized polymer on germination and growth of sugar beet seedling in laboratory, greenhouse, and field. the study was conducted based on randomized complete block design with four replications at sugar beet seed institute, karaj, iran in 2010-2012. the treatments were uncoated (control) and coated seed with foreign polymer, and also seve...