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  • 1
    Electronic Resource
    Electronic Resource
    Silphenylene and silphenylene-siloxane oligomers: Structure-property relationships (1995)
    Springer
    Journal of inorganic and organometallic polymers and materials 5 (1995), S. 75-85 
    Details
    ISSN: 1572-8870
    Keywords: Silphenylene ; silphenylene siloxane ; structure property relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Some representative oligomers were prepared by polycondensation reactions of dimethyldichlorosilane with 1,4-di-Grignard reagent prepared from 1,4-dibromobenzene in diethyl ether. The structural characterization of the oligomers was carried out by FTIR and1H,13C, and29Si NMR spectroscopy. TheM n values were determined by vapor pressure osmometry. TheT g values were measured by DSC and the thermodegradation process was analyzed by TGA. In all cases the oligomers prepared in the absence of the blocking end group showed siloxane units in the main chain, which were quantified by1H and29Si NMR.29Si NMR was also used to determine the oligomer sequence. It was possible to correlate the $$\bar M_n $$ and structure withT g and with temperature at 3% weight loss. The results agree with these obtained for structurally similar polymers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01157524
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Blends of organosilicon polymers with polystyrene and poly(2,6-dimethyl-1,4-phenylene oxide) (1997)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 35 (1997), S. 2609-2616 
    Details
    ISSN: 0887-6266
    Keywords: blends ; organosilicon polymers ; polystyrene ; poly(2,6-dimethyl-1,4-phenylene oxide) ; Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Blends of organosilicon polymers with polystyrene, PS, and poly(2,6-dimethyl-1,4-phenylene oxide), PPE, were investigated by transmission electron microscopy and differencial scanning calorimetry. Blends with poly(tetramethylsilphenylenesiloxane), PTMPS, showed a morphology characterized by globular domains dispersed in the organic matrix. An apparent homogeneous system was observed when poly(dimethylsilphenylene), PDSP, was mixed with PPE. A crystalline phase was found in samples with a higher PDSP content. The morphology of PS/PDSP blends with low PDSP content showed a dendritic phase dispersed in the PS-rich matrix. © 1997 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 35: 2609-2616, 1997
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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