Crystallization of polymers at constant and high cooling rates: A new hot-stage microscopy set-up

Abstract : A prototype hot-stage termed "Polymer High Cooling - Optics" was especially designed to follow on-line the nucleation and growth of crystallizing entities at constant cooling rates. The optically transparent hot-stage receives a gaseous flow at a constant temperature, which passes over the sample. Quiescent crystallization is monitored in real-time at relatively moderate (from 30 to 500 degrees C/min) and even at high (from 500 to 2000 degrees C/min) constant cooling rates. As a first application of this new set-up, two relevant parameters of the cc-modification of isotactic polypropylene, i.e., the crystallization temperature and the spherulite growth rate, were successfully captured for different constant cooling rates in a reproducible way. The superposition of these newly-collected growth rate data with those compiled by Janeschitz-Kriegl (2006) demonstrates the reliability of our experimental determination.
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Soumis le : lundi 16 août 2010 - 11:14:27
Dernière modification le : lundi 12 novembre 2018 - 11:04:01

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Séverine A.E. Boyer, Jean-Marc Haudin. Crystallization of polymers at constant and high cooling rates: A new hot-stage microscopy set-up. Polymer Testing, Elsevier, 2010, 29 (4), pp.Pages 445-452. ⟨10.1016/j.polymertesting.2010.02.003⟩. ⟨hal-00509756⟩

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