Direct atomistic modelling of deformed polymer glasses

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Samenvatting

We use molecular-dynamics computer simulations to explore the influence of thermal and mechanical history of typical glassy polymers, atactic polystyrene (PS) and (bis)phenol A polycarbonate (PC), on their deformation. Polymer stress-strain and energy-strain developments have been followed for different deformation velocities, also in closed extension-recompression loops. The latter simulate for the first time the experimentally observed mechanical rejuvenation and overaging of polymers. Energy partitioning reveals essential differences between mechanical and thermal rejuvenation. All results are qualitatively interpreted by considering the ratio's of relevant timescales: for cooling down, for deformation, and for intrinsic segmental relaxation.
Originele taal-2Engels
TitelProceedings of the XVth International Congress on Rheology : the Society of Rheology 80th annual meeting (ICR 2008), 3–8 August 2008, Monterey (California)
RedacteurenA. Co, G.L. Leal, R.H. Colby, A.j. Giacomin
Plaats van productieMelville, NY
UitgeverijAmerican Institute of Physics
Pagina's1330-1332
ISBN van geprinte versie978-0-7354-0549-3
DOI's
StatusGepubliceerd - 2008

Publicatie series

NaamAIP Conference Proceedings
Volume1027
ISSN van geprinte versie0094-243X

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