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  • 1
    Electronic Resource
    Electronic Resource
    Structure-property comparison of sulfonated and carboxylated telechelic ionomers based on polyisoprene (1992)
    s.l. : American Chemical Society
    Macromolecules 25 (1992), S. 3996-4001 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00041a023
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  • 2
    Electronic Resource
    Electronic Resource
    Crystal structures of a solvated and unsolvated sulfone cyclic oligomer (1999)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 32 (1999), S. 15-20 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: The structure of the DMSO (dimethyl sulfoxide) solvate of the macrocyclic [2+2] dimer, 17,17,37,37-tetramethyl-2,12,22,32-tetraoxa-7,27-dithianonacyclo[36.2.2.2^{3,6}.-2^{8,11}.2^{13,16} .2^{18,21} .2^{23,26} .2^{28,31} .2^{33,36} ]hexapentaconta-3,5,8,-10,13,15,18,20,23,25,28,30,33,35,38,40,41,43,45,47,49,51,53,55-tetracosaene 7,7,27,27-tetraoxide, formed from 4,\!4'-dichlorodiphenyl sulfone and bisphenol-A has been determined by single-crystal techniques and the structure of the unsolvated dimer refined using X-ray powder diffraction data. The molecular conformations are similar and phenyl–phenyl stacking interactions are apparently important in determining the molecular conformation in the solid state. {\rm C_{54}H_{44}O_8S_2} .{\rm C_2H_6OS} (1) cyclo-[p\hbox{-}{\rm C_6H_4)SO_2(}p\hbox{-}{\rm C_6H_4)O(}p{\rm \hbox{-}C_6H_4){\rm C(CH_3)_2(}p{\rm \hbox{-} {\rm C_6H_4)O]_2}.{\rm C_2H_6OS}: molecular weight 963.2, monoclinic, P2_1/c,a=9.702 (2), b=18.623 (3), c=13.676 (2) Å, \beta =91.18 (1)^\circ , V=2470.5 (7) Å^3,Z=2 .{\rm C_{54}H_{44}O_8S_2} (2), cyclo-[(p{\rm \hbox{-} C_6H_4)SO_2(}p{\rm \hbox{-} {\rm C_6H_4)O(}p{\rm \hbox{-} C_6H_4)C(CH_3)_2(}p{\rm \hbox{-} {\rm C_6H_4)O]_2} : molecular weight 885.06, monoclinic, P2_1/c , a=9.5703 (15), b=18.7582 (18), c=13.3945 (12) Å, \beta =92.684 (11)^\circ , V=2402.0 (5) Å^3,Z=2 .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889898006189
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  • 3
    Electronic Resource
    Electronic Resource
    Selective plasticization of the ionic domains in a segmented thermoplastic ionene cationomer (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 43 (1991), S. 951-966 
    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: The use of zinc stearate as an ionic plasticizer has been demonstrated to function effectively in a segmented ionene cationomer thereby permitting its melt processability. The ionene polymer is prepared by reacting dimethylamino-terminated polytetramethylene oxide (PTMO) oligomers with various benzyl dihalide compounds, leading to a segmented cationomer. Since the unplasticized ionene polymer undergoes degradation near the softening temperature (ca. 180°C), an ionic plasticizer was incorporated as a means of lowering the softening temperature to prevent degradation and permit melt processability. Zinc stearate was utilized in this study as it has been demonstrated to function well in other ionomers (essentially anionomers) in this capacity. Through the utilization of melt rheological and solid-state morphological investigations, it has been clearly shown that zinc stearate will function effectively as an ionic plasticizer in these quite different ionomer materials by lowering the softening temperature to ca. 120°C, thereby permitting melt processability. In addition, due to the crystallization of the zinc stearate following cooling, this same species also serves to enhance the mechanical properties in the solid state.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1991.070430513
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  • 4
    Electronic Resource
    Electronic Resource
    Structure-property behavior of elastomeric segmented PTMO-ionene polymers. II (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 38 (1989), S. 1549-1565 
    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: A series of segmented ionene polymers based on the reaction of α,ω-bis(dimethyl amino)polytetramethylene oxide with various dihalide compounds were investigated with respect to their structure-property behavior. The placement of quaternary ammonium ions and halide counterions along the polymer chains was varied by changing the molecular weight of the PTMO soft segment and the structure of the dihalide linking agent. The techniques of dynamic mechanical spectroscopy, thermal analysis, small angle X-ray scattering, and stress-strain behavior analysis were applied. For the case when the PTMO soft segment was amorphous, the ambient temperature properties of these materials displayed low modulus, high strength, and high elongation elastomeric behavior with tensile strength enhanced by the strain-induced crystallization of the PTMO. A high level of phase separation existed between the dihalide component relative to the PTMO soft segment. Due to the Coulombic association of the ionene species, these materials displayed many similarities to the segmented urethane ionomers. In particular, distinct domain structure was noted by SAXS, whose dimensional scale was similar to the segmented urethanes. It was also shown, however, that the driving forces for the microphase separation was caused by favorable electrostatic or Coulombic interactions in contrast to segment-segment incompatibility features as in the segmented urethanes.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1989.070380811
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  • 5
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    Unknown
    Structure-property comparison of sulfonated and carboxylated telechelic ionomers based on polyisoprene (1992)
    American Chemical Society
    Details
    Publication Date: 1992-07-01
    Print ISSN: 0024-9297
    Electronic ISSN: 1520-5835
    Topics: Chemistry and Pharmacology , Physics
    Published by American Chemical Society
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  • 6
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    Crystal structures of a solvated and unsolvated sulfone cyclic oligomer (1996)
    International Union of Crystallography
    Details
    Publication Date: 1996-08-08
    Print ISSN: 0108-7673
    Electronic ISSN: 2053-2733
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Published by International Union of Crystallography
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  • 7
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    Crystal structures of a solvated and unsolvated sulfone cyclic oligomer (1999)
    International Union of Crystallography
    Details
    Publication Date: 1999-02-01
    Description: The structure of the DMSO (dimethyl sulfoxide) solvate of the macrocyclic [2+2] dimer, 17,17,37,37-tetramethyl-2,12,22,32-tetraoxa-7,27-dithianonacyclo[36.2.2.2^{3,6}.-2^{8,11}.2^{13,16} .2^{18,21} .2^{23,26} .2^{28,31} .2^{33,36} ]hexapentaconta-3,5,8,-10,13,15,18,20,23,25,28,30,33,35,38,40,41,43,45,47,49,51,53,55-tetracosaene 7,7,27,27-tetraoxide, formed from 4,!4'-dichlorodiphenyl sulfone and bisphenol-A has been determined by single-crystal techniques and the structure of the unsolvated dimer refined using X-ray powder diffraction data. The molecular conformations are similar and phenyl–phenyl stacking interactions are apparently important in determining the molecular conformation in the solid state. { m C_{54}H_{44}O_8S_2} .{ m C_2H_6OS} (1)cyclo-[phbox{-}{ m C_6H_4)SO_2(}phbox{-}{ m C_6H_4)O(}p{ m hbox{-}C_6H_4){ m C(CH_3)_2(}p{ m hbox{-} { m C_6H_4)O]_2}.{ m C_2H_6OS}: molecular weight 963.2, monoclinic, P2_1/c,a=9.702  (2), b=18.623  (3), c=13.676  (2) Å, eta =91.18 (1)^circ , V=2470.5  (7) Å^3,Z=2 .{ m C_{54}H_{44}O_8S_2} (2),cyclo-[(p{ m hbox{-} C_6H_4)SO_2(}p{ m hbox{-} { m C_6H_4)O(}p{ m hbox{-} C_6H_4)C(CH_3)_2(}p{ m hbox{-} { m C_6H_4)O]_2} : molecular weight 885.06, monoclinic, P2_1/c , a=9.5703  (15), b=18.7582  (18), c=13.3945  (12) Å, eta =92.684 (11)^circ , V=2402.0  (5) Å^3,Z=2 .
    Print ISSN: 0021-8898
    Electronic ISSN: 1600-5767
    Topics: Geosciences , Physics
    Published by International Union of Crystallography
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