Accession Number:

ADA175126

Title:

Small Angle X-Ray Scattering Study of Micro- and Macro-Phase Separations in Blends of Block Copolymer with Homopolymer.

Descriptive Note:

Technical rept.,

Corporate Author:

CINCINNATI UNIV OH DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s):

Report Date:

1986-12-15

Pagination or Media Count:

10.0

Abstract:

The order-disorder phase transition behavior exhibited by blends of a styrene-butadiene diblock copolymer 76 styrene with a polystyrene of various molecular weight from 2,200 to 50,000 is studied by means of small-angle X-ray scattering. With a polystyrene of a relatively short chain length the blend, on lowering the temperature, undergoes a microphase separation, and the scattering curve shows a peak at a finite scattering angle. With a polystyrene of relatively long chain length, the scattered intensity curve shows additional low angle component with intensity increasing rapidly as q approaches 0, and this is interpreted in terms o the microphase separation accompanying the transition from the disordered to ordered phase.

Subject Categories:

  • Polymer Chemistry
  • Plastics
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE