Colloid and Polymer Science

, Volume 270, Issue 5, pp 399–404 | Cite as

Craze fibril extension ratio measurements in glassy block copolymers

  • C. Creton
  • E. J. Kramer
  • G. Hadziioannou
Original Contributions


The extension ratios of crazes in triblock copolymer films of poly(2-vinylpyridine)-polystyrene-poly(2-vinylpyridine) [PVP-PS-PVP] which had lamellar microphase domain structure were measured by transmission electron microscopy. The extension ratio when the lamellae were oriented parallel to the craze fibril direction was always greater than that when the lamellae were oriented perpendicular to this direction, reflecting the stretching of the chains of the block copolymer in a direction normal to the interfaces of the lamellar domains.

Key words

Craze triblock copolymer morphology chain stretching lamellae 


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Copyright information

© Steinkopff-Verlag 1992

Authors and Affiliations

  • C. Creton
    • 1
    • 2
  • E. J. Kramer
    • 1
    • 2
  • G. Hadziioannou
    • 3
    • 1
    • 2
  1. 1.Department of Materials Science and EngineeringCornell UniversityIthacaUSA
  2. 2.the Materials Science CenterCornell UniversityIthacaUSA
  3. 3.IBM Almaden Research CenterSan JoseUSA

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