1. Crystallization of polypropylene at high cooling rates: Microscopic and calorimetric studies
- Author
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Jean-Marc Haudin, Phil Robinson, Jean-Philippe Melis, Séverine A.E. Boyer, Pierre Ganet, Centre de Mise en Forme des Matériaux (CEMEF), MINES ParisTech - École nationale supérieure des mines de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Département Technologie des Polymères et Composites & Ingénierie Mécanique (TPCIM), École des Mines de Douai (Mines Douai EMD), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT)-Ministère de l'Economie, des Finances et de l'Industrie, PerkinElmer, PerkinElmer LAS, and Catalyse
- Subjects
Materials science ,Polymers and Plastics ,Nucleation ,Extrapolation ,Thermodynamics ,02 engineering and technology ,010402 general chemistry ,Optical microscopy ,01 natural sciences ,law.invention ,[SPI.MAT]Engineering Sciences [physics]/Materials ,chemistry.chemical_compound ,Differential scanning calorimetry ,law ,Tacticity ,Materials Chemistry ,Crystallization ,Polypropylene ,chemistry.chemical_classification ,General Chemistry ,Polymer ,Atmospheric temperature range ,021001 nanoscience & nanotechnology ,0104 chemical sciences ,Surfaces, Coatings and Films ,Crystallography ,chemistry ,0210 nano-technology ,High cooling rate - Abstract
This article was presented at the 4th International Conference on Polymer Behavior, International Union of Pure and Applied Chemistry, Lodz, Poland, September 20-23, 2010.; International audience; The use of three different calorimeters made it possible to measure the overall kinetics of isotactic polypropylene in the α-phase in a wide temperature range. Original results concerning the growth rate of α spherulites were also obtained by optical microscopy by using a prototype hot stage developed in our laboratory. A new growth regime seems to exist at low crystallization temperature. The number of nuclei shows a smooth evolution with temperature with no rupture in the nucleation behavior in the low-temperature range. Combination of experimental results and an appropriate extrapolation procedure lead to an overall kinetics law valid in the whole domain of existence of the α-phase. This law is based on Ozawa's formalism. It will be used in polymer processing.
- Published
- 2012
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