✦ LIBER ✦

Anisotropy of hole structures in oriented polycarbonate probed by two-dimensional angular correlation of annihilation radiation

✍ Scribed by Y. C. Jean; Y. Rhee; Y. Lou; D. Shelby; G. L. Wilkes

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 802 KB
Volume: 34
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(199612)34:17<2979::aid-polb10>3.0.co;2-5

No coin nor oath required. For personal study only.

✦ Synopsis

Two-dimensional angular correlation of annihilation radiation (2D-ACAR) experiments

have been performed on a uniaxially oriented polymer, bisphenol-A polycarbonate. The two-dimensional hole structures of unoriented and oriented polymers, determined from t,he momentum distributions, are found to be spherical and ellipsoidal, respectively. The average hole radii are determined to be 2.9 A in the unoriented sample and between 2.3 and 3.8 A in the oriented sample. Applications of the 2D-ACAR method to image the three-dimensional hole structures of polymeric materials are discussed.