Molecular Dynamics in Cyclic Olefin Copolymer

• Authors: M. Makrocka-Rydzyk , B. Orozbaev , G. Nowaczyk , S. Głowinkowski , S. Jurga
• Languages of publication: EN

Abstracts

EN

Nuclear magnetic resonance, broadband dielectric spectroscopy and dynamic-mechanical thermal analysis were employed to study molecular dynamics of ethylene-norbornene copolymer. The analysis of experimental data indicates existence of three motional processes denoted asαβ, andγ in order of decreasing temperature. Theα relaxation is related to the dynamic glass transition, while theβ relaxation, observed only for the untreated sample, is assigned to short range segmental motions involving norbornene units. Theγ relaxation is due to very local motions of ethylene units e.g. trans-gauche isomerization, similar to those responsible forγ relaxation in polyethylene. The rate of motion accountable for γ process, follows the Vogel-Fulcher-Tammann equation, similarly to α transition, indicating cooperative nature of the motion.

Keywords

EN

36.20.Ey; 76.60.-k; 77.22.Gm; 83.85.Vb; 82.35.Jk

Discipline

• 76.60.-k: Nuclear magnetic resonance and relaxation(see also 33.25.+k Nuclear resonance and relaxation in atomic and molecular physics and 82.56.-b Nuclear magnetic resonance in physical chemistry and chemical physics; for structure determination using magnetic resonance techniques, see 61.05.Qr; for biophysical applications, see 87.80.Lg; for NMR in superconducting materials, see 74.25.nj)
• 77.22.Gm: Dielectric loss and relaxation
• 36.20.Ey: Conformation (statistics and dynamics)
• 82.35.Jk: Copolymers, phase transitions, structure
• 83.85.Vb: Small amplitude oscillatory shear (dynamic mechanical analysis)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2005
• Volume: 108
• Issue: 2
• Pages: 385-393

Dates

published

2005-08

received

2005-04-24

Contributors

author

M. Makrocka-Rydzyk

• Department of Macromolecular Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

B. Orozbaev

• Department of Macromolecular Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

G. Nowaczyk

• Department of Macromolecular Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

S. Głowinkowski

• Department of Macromolecular Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

S. Jurga

• Department of Macromolecular Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

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Identifiers

DOI

10.12693/APhysPolA.108.385