Effect of molecular orientation on the elastic constants of polypropylene.

Journal Article · Tue Mar 07 00:00:00 EST 2000 · Macromolecules

DOI:https://doi.org/10.1021/ma9906579· OSTI ID:942620

Kumar, S R; Renusch, D P; Grimsditch, M

The Brillouin spectroscopic measurements of elastic properties of polypropylene films fabricated by different processing techniques are described. We find that the elastic symmetry and the associated elastic constants are dependent on the molecular orientation brought about by the processing conditions used to produce the films. We have shown that Brillouin scattering techniques can successfully be used to track the molecular orientation induced by uniaxial stretching. We find a direct correspondence between the Brillouin measurements and optical birefringence measurements, illustrating that molecular orientation plays a dominant role in determining the mechanical anisotropy in these materials.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 942620
• Report Number(s): ANL/MSD/JA-33104; TRN: US200920%%78
• Journal Information: Macromolecules, Vol. 33, Issue 5 ; Mar. 7, 2000
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BIREFRINGENCE
BRILLOUIN EFFECT
ELASTICITY
FILMS
MATERIALS
ORIENTATION
PARTICLE TRACKS
POLYPROPYLENE
PROCESSING
SYMMETRY
THERMOPLASTICS