Abstract
Semi-interpenetrating networks are prepared by reactive processing of cross-linked poly(dimethylphenylsiloxane) (PDMPS) and linear polyurethane (PU). Their structure and thermal properties are investigated by wide-angle X-ray scattering (WAXS), small-angle X-ray scattering (SAXS), differential scanning calorimetry (DSC), and IR spectroscopy. The characteristic size of nanophase-separated regions is approximately equal to 102 nm. The fine structure of the polymer components in domains formed is retained on a nanometer scale. The WAXS curves of the mixtures are characterized by additive contributions for all the concentrations under investigation. This indicates that the microphase separation occurs on the molecular level. The glass transition temperatures of mixtures are virtually equal to that of linear polyurethane (− 65°C). The polymer mixtures are destructed in the temperature range 240–700° C. In this range, the DSC curves exhibit thermal effects characteristic of individual polymers.
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Original Russian Text Copyright © 2005 by Fizika i Khimiya Stekla, Shilov, Glebova, Gomza, Golubkov, Ugolkov.
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Shilov, V.V., Glebova, I.B., Gomza, Y.P. et al. Structural Characteristics and Thermal Transformations of a Poly(dimethylphenylsiloxane)-Polyurethane (Glycol Diisocyanate Oligomer) Mixture Prepared by Reactive Processing in a Toluene Solution. Glass Phys Chem 31, 505–509 (2005). https://doi.org/10.1007/s10720-005-0090-0
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DOI: https://doi.org/10.1007/s10720-005-0090-0