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  • 1
    Electronic Resource
    Electronic Resource
    A miscibility study of ternary blends of polystyrene, tetramethylbisphenol-A polycarbonate, and poly(2,6-dimethyl-1,4-phenylene oxide) (1994)
    Springer
    Journal of polymer research 1 (1994), S. 227-234 
    Details
    ISSN: 1572-8935
    Keywords: Miscibility ; Ternary blends ; Differential scanning calorimetry ; 1Δχl effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Phase behaviorof ternary blends of polystyrene (PS), tetramethylbisphenol-A polycarbonate (TMPC), and poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) at two different temperatures (i.e., 210 and 300 °C, respectively) was studied by means of differential scanning calorimetry. Miscibility of the ternary blends at either temperature was found restricted to limited compositions, in agreement with simulated spinodal curves based on published values of interaction parameters. The limited ability of PS, which is separately miscible with TMPC and PPO at 210 °C, to act as a common “solvent’ for the immiscible TMPC/PPO pair at this temperature was explained in terms of the disparity in PS/TMPC and PS/PPO pair interactions (i.e., the ‘'‖ΔX‖ effect’).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01374547
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  • 2
    Electronic Resource
    Electronic Resource
    Breakthrough of lysozyme through an affinity membrane of cellulose-cibacron blue (1994)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 40 (1994), S. 40-49 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The dynamic affinity adsorption oflysozyme through stacked flat-sheet cellulose membranes with immobilized cibacron blue 3GA was studied and compared to three affinity-membrane models: diffusion model to explore the importance of axial and radial diffusion; variation model to study the effects of pore-size distribution or thickness variation; and stack model to investigate the effects of stacking flat-sheet membranes. For the diffusion model, when Per 〉 0.1, radial diffusional resistance is significant, but when Pez 〈 25, axial dispersion must be considered. For the variation model, increasing pore-size distribution or nonuniform membrane thickness greatly broadens the breakthrough curve. The stack model shows that the stacking of membranes significantly sharpens the breakthrough curves by averaging out the flow dispersion due to pore-size distribution or thickness variation.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690400107
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of sorbed carbon dioxide on the impact strength of amorphous glassy polymers (1990)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 28 (1990), S. 7-12 
    Details
    ISSN: 0887-6258
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1990.140280102
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  • 4
    Electronic Resource
    Electronic Resource
    High-pressure FTIR studies of gas-polymer interactions (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 41 (1990), S. 1123-1131 
    Details
    ISSN: 0021-8995
    Keywords: 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 , Physics
    Notes: FTIR spectra of cellulose acetate (CA) and poly(methyl methacrylate) (PMMA) at 35°C have been obtained as a function of carbon dioxide pressure at pressures up to 55 atm in a specially designed FTIR cell. Results indicate that the carbonyl stretching vibrations for CA (1752 cm-1) and PMMA (1731 cm-1) shift to slightly higher wave numbers with increasing pressure. The small shifts suggest dipole-dipole interactions between CO2 and the carbonyl group. In both cases, the shift appears to be linear with pressure. This linearity is interpreted in the framework of the dualmode theory to suggest that gas-polymer interactions occur in the Henry's law dissolution mode.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1990.070410521
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