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  • 1
    Electronic Resource
    Electronic Resource
    Rheologic properties of semi-rigid polymers for the example of cellulose nitrate, 2Part 1: cf.13. Influence of molecular weight distribution on the flow curves of semi-dilute solutionsDedicated to Professor H. J. Cantow on the occasion of his 65th birthday (1988)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 189 (1988), S. 2409-2417 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The apparent viscosity η of semi-dilute solutions of cellulose nitrate in ethyl acetate was measured as a function of shear rate at 20°C by rotational viscometry. The mass concentration c of the solutions was chosen such that the product between c and the intrinsic viscosity was 8 〈 c · [η] 〈 22, lying in the range of viscosity-average degrees of polymerization covered by the employed samples 550 〈 DPη 〈 7600. The experimental flow curves were interpreted in terms of Graessley's theory for non-Newtonian flow of polydisperse polymers. The polydispersities derived for five individual samples according to the theory of Graessley were used for calculating the resulting theoretical curves belonging to four binary mixtures each between two of them. The reasonable good agreement between calculated and experimental reduced flow curves of blends indicates consistency of the theory when applied to the present system of a semi-rigid polymer. This and other results point to a flow behaviour of semi-rigid cellulose nitrate being similar to that of linear flexible polymers.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1988.021891018
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Protein adsorption on polystyrene latex particles (1995)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 6 (1995), S. 518-525 
    Details
    ISSN: 1042-7147
    Keywords: polystyrene latex ; protein adsorption ; adsorption isotherm ; electrophoresis ; hydrogen ion titration ; calorimetry ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Protein adsorption is the net result of various types of interaction between the different components present in the system, i.e. the sorbent surface, the protein(s), the solvent and any other solutes such as low molecular weight electrolyte. In this paper methods and techniques will be discussed to study the mechanism of protein adsorption on, in particular, colloidal particles. The discussion is based on experimental data obtained with relatively simple systems that contain one well-defined protein and well-characterized polystyrene latexes. Thus, the adsorption behavior of lysozyme and α-lactalbumin are compared, emphasizing the role of structural rearrangements in the protein molecule.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pat.1995.220060713
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    Paper (German National Licenses)
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