The mechanical characteristics in the region of the primary relaxation have been measured in linear (bisphenol-A-polycarbonate and polyurethane) and reticulated (a fully crosslinked heterocyclic network) amorphous polymers. It is found a correlation between the fragility and the anharmonicity of the systems, the most fragile polymer being characterized by the largest anharmonicity.
Anharmonicity and fragility in linear and reticulated polymers
CARINI, Giuseppe;D'ANGELO, Giovanna;TRIPODO, Gaspare;
2000-01-01
Abstract
The mechanical characteristics in the region of the primary relaxation have been measured in linear (bisphenol-A-polycarbonate and polyurethane) and reticulated (a fully crosslinked heterocyclic network) amorphous polymers. It is found a correlation between the fragility and the anharmonicity of the systems, the most fragile polymer being characterized by the largest anharmonicity.File in questo prodotto:
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