Influence of an oriented glassy cylindrical microdomain structure on the morphology of crystallizing lamellae in a semicrystalline block terpolymer

Cheolmin Park, Claudio De Rosa, Lewis J. Fetters, Edwin L. Thomas

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Abstract

The effect of an oriented microphase-separated structure, induced by an applied flow bias field (roll casting), on the crystallization of the polyethylene (PE) block in a semicrystalline polystyrene-block-(polyethylene-alt-propylene)-block-polyethylene terpolymer has been analyzed. The orientation and morphology of the emerging crystals with respect to the preexisting glassy cylindrical microdomain structure has been investigated by simultaneous wide-angle and small-angle X-ray scattering and transmission electron microscopy. The oriented hexagonally packed cylinders induce oriented crystallization of the PE block in the matrix upon slow cooling below the crystallization temperature. The texture which develops has the b and c axes of the PE crystals predominantly parallel and perpendicular to the PS cylinder axes, respectively. The lateral packing of the PS cylinders is disrupted by the crystallization, but the longitudinal orientation of the cylinders is maintained.

Original languageEnglish
Pages (from-to)7931-7938
Number of pages8
JournalMacromolecules
Volume33
Issue number21
DOIs
Publication statusPublished - 2000 Oct 1

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All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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