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  • cellulose  (3)
  • Wiley-Blackwell  (3)
  • American Institute of Physics
  • 1995-1999  (3)
  • 1995  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Cellulose-polyamide 66 blends. Part II: Mechanical behavior (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 33 (1995), S. 2109-2124 
    Details
    ISSN: 0887-6266
    Keywords: cellulose ; polyamide ; polymer blends ; solid-state NMR ; mechanical properties ; miscibility ; adhesion ; modeling ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Blends of the natural polymer cellulose with a synthetic polymer, polyamide 66, are studied in order to determine if the expected strong interaction between them, due to hydrogen bonds, could improve their mechanical properties such as strength and elongation at break. In a previous work {Part I, J. Polym. Sci. Polym. Phys., 32, 1437 (1994)}, the preparation technique and the characterization of cellulose-polyamide 66 (PA66) blends were described in detail. Several samples in the composition range between 0 to 70 wt % of PA66 were carefully dried and examined using dynamic mechanical and tensile tests. Based on previous work a new percolation model has been developed. It takes both linear and nonlinear mechanical behaviors into account and allows for the effect of adhesion between material domains. From comparison between experimental and predicted data, it is concluded that a partial miscibility between the amorphous phases of cellulose and PA66 exists and is responsible for a strong adhesion at their interface. Solid-state 13C nuclear magnetic resonance has also been used to study these samples and supports the existence of strong interactions between both homopolymers. © 1995 John Wiley & Sons, Inc.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1995.090331502
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  • 2
    Electronic Resource
    Electronic Resource
    Analytical separation of Trichoderma Reesei cellulases by Capillary Zone Electrophoresis (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Microcolumn Separations 7 (1995), S. 429-433 
    Details
    ISSN: 1040-7685
    Keywords: Capillary Zone Electrophoresis ; pH effect ; cellulase enzyme separation ; Trichoderma Reesei ; cellulose ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Capillary Zone Electrophoretic separation of the four common enzymes of Cellulase, the endo-(EG I, EG II) and the exo-(CBH I, and CBH II) glucohydrolases from the fungi Trichoderma Reesei, is presented. The separation using underivatized fused silica capillaries with 0.03 M Na2HPO4 at an optimum pH of 9.2 proved successful, rapid, and reproducible. Variations in buffer type, ionic strength, pH, temperature, and reduced electroosmotic flow and their effects on the separation were investigated revealing a significant effect on the efficiency, the separation, and the integrity of the enzymes. © 1995 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mcs.1220070416
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  • 3
    Electronic Resource
    Electronic Resource
    Nanocomposite materials from latex and cellulose whiskers (1995)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 6 (1995), S. 351-355 
    Details
    ISSN: 1042-7147
    Keywords: polymer films ; latex ; cellulose ; short fibers ; whiskers ; composite materials ; mechanical properties ; mechanical modeling ; 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: Composite materials were processed by casting a mixture of aqueous suspensions of latex and microfibrils. These microfibrils, or whiskers, are extracted from a sea animal and are monocrystals of cellulose, with an aspect ratio around 100 and an average diameter of 20 nm. It has been found that the mechanical properties (shear modulus) are increased by more than two orders of magnitude in the rubbery state of the polymeric matrix, when the whisker content was 6% (w/w). This very large effect is discussed on the basis of different types of mechanical models and it is concluded that these whiskers form a rigid network, probably linked by hydrogen bonds. The formation of this network is assumed to be governed by a percolation mechanism.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pat.1995.220060514
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