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  • 1
    Electronic Resource
    Electronic Resource
    Study on epoxy network solid electrolytes (1990)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 191 (1990), S. 2529-2536 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Blends of the diglycidyl ether of poly(ethylene glycol) (1)IUPAC name of 1: α-(2,3-epoxypropyl)-ω-(2,3-epoxypropoxy)poly(oxyethylene). and the triglycidyl ether of glycerol (2)IUPAC name of 2: 1,2,3-tris(2,3-epoxypropoxy)propane. were crosslinked in the presence of LiClO4 which seems to act as both a catalytic curing agent and as the source of the ionic charge carriers. The cured film showed a rather high ionic conductivity of about 10-5 S/cm at 25°C. The effect of composition, salt concentration and molecular weight of 1 on the conductivity and on the glass transition temperature Tg of the cured 1/2LiClO4 system was examined. The conductivity increased whereas Tg decreased with increasing 1/2 ratio. An increase of the molecular weight of 1 favoured the lowering of Tg and thus raised the conductivity. As to the effect of LiCIO4 concentration, the maximum conductivity occurred at about 5 wt.-% of LiClO4 and Tg increased with increasing LiClO4 content. The temperature dependence of the conductivity followed the Vogel-Tamman-Fulcher equation. This indicated that the ionic conductivity is effected by the cooperative segmental motion. All of the prepared specimens were found to be amorphous. They were mechanically strong films and showed rubber-elasticity at room temperature.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1990.021911102
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Gamma-radiation damage to polyamide-1010 crystal structure (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 35 (1994), S. 335-359 
    Details
    ISSN: 0959-8103
    Keywords: polymide-1010 ; radiation effect ; wide angle X-ray diffraction ; crystal damage ; amorphotization ; 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: Radiation effects on polyamide-1010 specimens having various states of aggregation were studied using wide angle X-ray diffraction, electron spin resonance, calorific and sol measurement techniques. Experimental results indicated that chain crosslinking and scission of the irradiated polyamide-1010 occurred mainly in the amorphous region and on the crystal surface. The radiation-induced crystal damage and amorphotization started from the crystal surface (or interface) and extended into the inner portion of the crystal with increasing radiation dose. It is believed that the interface between crystalline and amorphous regions was the main region wherein free radicals were trapped.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1994.210350408
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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