期刊
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
卷 47, 期 20, 页码 2015-2025出版社
WILEY
DOI: 10.1002/polb.21800
关键词
aging; annealing; calorimetry; hydrostatic pressure; polyamides; secondary crystallization; self-organization; semicrystalline polymer; structural characterization
资金
- University of Poitiers and ENSMA (France).
This work focuses on the pressure dependence of some microstructure changes like the secondary crystallization induced by annealing above the glass transition temperature. Polyamide 11 samples were annealed under a hydrostatic argon pressure ranging from the ambient up to 4000 bars. Structural evolutions were investigated by differential scanning calorimetry (DSC) and compared with similar experiments performed under atmospheric pressure. Pressure results in a strong shift of the endothermic peak observed in DSC traces toward lower temperatures, with a change of kinetics. The pressure sensitivity is clearly nonlinear. It decreases with increasing pressure levels until saturating above about 3000 bars. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 47: 2015-2025, 2009
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