Strain hardening in model polymer brushes under shear

Langmuir

Volumn 17, Issue 5, 2001, Pages 1448-1452

  Krishnamoorti, Ramanan ^a   Giannelis, Emmanuel P ^b  

^a University of Houston   (United States)

^b Cornell University   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

POLYMER BRUSHES;

NANOSTRUCTURED MATERIALS; RHEOLOGY; SHEAR STRENGTH; STRAIN HARDENING; THERMAL EFFECTS;

AROMATIC POLYMERS;

EID: 0035815008     PISSN: 07437463     EISSN: None     Source Type: Journal    
DOI: 10.1021/la0000365     Document Type: Article

References (31)

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30. During the early stages of the large amplitude oscillatory shear (i.e., first 5 to 10 cycles of shear), the third harmonic of the torque was in the range of 1-7% of the primary harmonic. However, at later times the torque signal was dominated by the primary harmonic and the higher order harmonies were negligibly small.
31. The torque signal, as recorded electronically by connecting via the BNC connections provided in the rheometer, was sinusoidal with the higher order harmonics being negligibly small. Further, experiments repeated with gap widths ranging from 0.8 to 2.0 mm revealed viscoelastic functions independent of the thickness of the polymer sample.