| Download | - View accepted manuscript: Molten polystyrene structures above the glass transition, T > Tg (PDF, 1.1 MiB)
- View supplementary information: Molten polystyrene structures above the glass transition, T > Tg (PDF, 645 KiB)
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| DOI | Resolve DOI: https://doi.org/10.1002/polb.22313 |
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| Author | Search for: Utracki, L. A.1; Search for: Sammut, P.1 |
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| Affiliation | - National Research Council of Canada. NRC Industrial Materials Institute
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| Format | Text, Article |
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| Subject | Compressibility; Dynamic moduli; Equation-of-state; Polystyrene; Rheology; Thermal expansion |
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| Abstract | The old controversial idea of structures in molten amorphous polymers is being accepted with theoretical and experimental evidence. Wool’s twinkling fractal theory of the glass transition and recent atomic force micrographs are convincing proof of the dynamic, solid aggregate presence below and above Tg. This article offers detailed analysis of the experimental data from high-pressure dilatometry, as well as from the oscillatory shear tests in the glassy and themolten state of polystyrenes. The results indicate the presence of a transient structure at T > Tg; transient as it depends on the structure of the vitreous polymer and the rate of heating it across Tg. Thus, molten polymer is not always at the thermodynamic equilibrium. |
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| Publication date | 2011-10-01 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC number | NRCC 54369 |
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| NPARC number | 19019534 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 3f4e3512-fd82-43bd-82ad-27efecb8b7d7 |
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| Record created | 2011-12-02 |
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| Record modified | 2020-04-21 |
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