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Morphological Behavior of Polystyrene-block-Polylactide/Polystyrene-block-Poly(ethylene oxide) Blends

Authors

  • Huiming Mao,

    1. Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis MN 55455-0431, USA
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  • Marc A. Hillmyer

    Corresponding author
    1. Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis MN 55455-0431, USA
    • Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis MN 55455-0431, USA.
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Abstract

The morphological behavior of PS-containing diblock copolymer blends is reported. Three sets of PS/PLA and PS/PEO blends are prepared and evaluated by SAXS, WAXS, DSC, and DMA. No macrophase separation is observed, and the formation of PLA/PEO composite cylinders is identified by SAXS for all compositions. The PLA and PEO segments in these blends have been found to be miscible and the crystallization of the confined PEO is suppressed in the ordered nanostructures. The domain spacing, diameter of composite cylinders, and order/disorder transition temperature could be tuned by varying the blend composition in the binary blends.

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