Scattering from polymer networks under elongational strain.

Journal Article · Wed Jun 01 00:00:00 EDT 2005 · Proposed for publication in Europhysics Letters.

OSTI ID:971829

Grest, Gary Stephen; Svaneborg, Carsten ^[1]; Everaers, Ralf ^[1]

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1. Max-Planck-Institut for Complex Systems, Dresden, Germany

Molecular-dynamics simulations are used to sample the single-chain form factor of labelled sub-chains in model polymer networks under elongational strain. We observe very similar results for randomly cross-linked and for randomly end-linked networks with the same average strand length and see no indication of lozenge-like scattering patterns reported for some experimental systems. Our data analysis shows that a recent variant of the tube model quantitatively describes scattering in the Guinier regime as well as the macroscopic elastic properties. The observed failure of the theory outside the Guinier regime is shown to be due to non-Gaussian pair-distance distributions.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 971829
• Report Number(s): SAND2005-3430J
• Journal Information: Proposed for publication in Europhysics Letters., Journal Name: Proposed for publication in Europhysics Letters.
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COHERENT TUBE MODEL
DATA ANALYSIS
ELASTICITY
FORM FACTORS
POLYMERS
SCATTERING