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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Van, T. B. Erp
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (4/4 displayed)
- 2014The chemical structure of the amorphous phase of propylene-ethylene random copolymers in relation to their stress-strain propertiescitations
- 2012Quantification of non-isothermal, multi-phase crystallization of isotactic polypropylene : the influence of shear and pressurecitations
- 2012Rate-, temperature-, and structure-dependent yield kinetics of isotactic polypropylenecitations
- 2010Micromechanical modeling of the elastic properties of semicrystalline polymers: a three-phase approachcitations
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article
Rate-, temperature-, and structure-dependent yield kinetics of isotactic polypropylene
Abstract
The influence of cooling rate on the structure and resulting mechanical performance is explored for a set of isotactic polypropylenes with varying molecular weight, insertion of counits, and addition of a nucleating agent. A continuous variation of crystal type (a–mesomorphic phase competition) and structural features is obtained with cooling rate. These variations are discussed in relation to the strain rate- and temperature-dependent yield stress and time-to-failure kinetics. The deformation kinetics, characterized by constant activation volumes and energies in the Ree–Eyring theory, prove to be the same for various structures. Differences in thermal history are solely captured by two rate constants that are function of the structure. © 2012 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys, 2012