Sökning: "viscosity solution"

Visar resultat 1 - 5 av 106 avhandlingar innehållade orden viscosity solution.

1. 1. Association Phenomena Involving Hydrophobically Modified Polymers. Electrostatic and Hydrophobic Contributions

   Författare :Marina Tsianou; Fysikalisk kemi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; scaling; light scattering; rheology; aqueous solution behavior; phase behavior; cyclodextrin; surfactant; polyacrylate; cellulose ether; polyelectrolyte; hydrophobically modified polymer; Polymer; water soluble polymer; viscosity; association; segregation; Physical chemistry; Fysikalisk kemi;

   Sammanfattning : The electrostatic and hydrophobic interactions in aqueous solutions of hydrophobically-modified water-soluble non-ionic or ionic polymers, their mixtures with a second polymer, nonionic or of opposite charge, and their mixtures with surfactants of opposite charge have been investigated. The relative strength of the electrostatic and hydrophobic contributions has been modulated by a variation of the polymer charge density and the solution pH, and by a variation in the degree and strength of the hydrophobic modifications, respectively. LÄS MER

3. 2. Ethyl(hydroxyethyl)cellulose and Some Model Uncharged Polymers: A Calorimetric Study of Their Interaction with Surfactants in Aqueous Solution

   Författare :Geng Wang; Biokemi och Strukturbiologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; calorimetry; differntial scanning; isothermal titration; enthalpy; electrolyte; micelles; self-association; thermal gelling; interaction; alkyltrimethylammonium halides; sodium dodecylsulfate; surfactants; polymers; ethyl hydroxylethyl cellulose; viscosity; phase behavior; self-diffusion NMR; Physics; Fysik; Chemistry; Kemi; Fysicumarkivet A:1997:Wang;

   Sammanfattning : The interactions between uncharged polymers, e.g. ethyl(hydroxylethyl)cellulose (EHEC) and some model polymers, and ionic surfactants in aqueous solution has been studied by using isothermal titration and differential scanning calorimetry. LÄS MER

4. 3. Two aspects of viscous shocks : existence of a solution and numerical errors

   Författare :Malin Siklosi; KTH; []
   Nyckelord :hyperbolic conservation law; artificial viscosity; asymptotic analysis; existence; computer aided proof;

   Sammanfattning : .... LÄS MER

5. 4. Optimization of Pretreatment of Kraft Pulp with Nitrogen Oxides

   Författare :Urban Öjteg; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Kappa number; lignins; Nitric acid; Magnesium; spent liquors; viscosity; softwood; oxygen bleaching; Nitrogen dioxide; Manganese; Oxygen; Nitrogen oxides; pretreatment; Kraft pulp;

   Sammanfattning : Modified kraft pulp subjected to oxygen bleaching following pretreatment with 2% nitrogen dioxide for 140 min with the addition of oxygen resulted in low selectivity after subsequent oxygen bleaching. In contrast, pretreatment in the absence of oxygen removed more than 80% of the lignin after oxygen bleaching and still maintained high selectivity (kappa number less than 5 at viscosity 950 dm3/kg). LÄS MER

7. 5. A Study on the Correlation between Ladle Glaze and Non-Metallic Inclusions in the Ladle Treatment

   Författare :Minho Song; Du Sichen; Jerome P. Downey; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; non-metallic inclusions; ladle treatment; ladle glaze; tracer; tool steel; viscosity; activity; modelling; Al2O3-CaO-MgO-SiO2 system; Materials science; Teknisk materialvetenskap;

   Sammanfattning : In the present thesis, the correlation between ladle glaze and non-metallic inclusions in the ladle treatment was studied. A number of industrial trials with full scale ladle and laboratory works were performed to investigate the inclusions in the ladle treatment. LÄS MER