Crystallization of polypropylene at high cooling rates: Microscopic and calorimetric studies - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Applied Polymer Science Année : 2012

Crystallization of polypropylene at high cooling rates: Microscopic and calorimetric studies

(1, 2) , (3) , (4) , (3) , (1)
1
2
3
4

Résumé

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.

Dates et versions

hal-00682771 , version 1 (26-03-2012)

Identifiants

Citer

Séverine A.E. Boyer, Phil Robinson, Pierre Ganet, Jean-Philippe Melis, Jean-Marc Haudin. Crystallization of polypropylene at high cooling rates: Microscopic and calorimetric studies. Journal of Applied Polymer Science, 2012, 125 (6), pp.4219-4232. ⟨10.1002/app.36578⟩. ⟨hal-00682771⟩
121 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook Twitter LinkedIn More