Features of the hedritic morphology of β-isotactic polypropylene studied by atomic force microscopy

被引：0
|
作者：
Haeringen, Dorina Trifonova-Van [1 ]
Varga, Jozsef [2 ]
Ehrenstein, Gottfried W. [2 ]
Vancso, G. Julius [1 ]
机构：
[1] Faculty of Chemical Technology, MESA+ Research Institute, University of Twente, P.O. Box 217, 7500 AE Enschede, Netherlands
[2] Friedrich-Alexander-Univ., E., Lehrstuhl für Kunststofftechnik, D-91058 Erlangen, Germany
来源：
| 2000年 / John Wiley & Sons Inc, New York, NY, United States卷 / 38期
关键词：
Atomic force microscopy - Crystal growth from melt - Crystal microstructure - Dislocations (crystals) - Etching - Morphology;
D O I：
10.1002/(SICI)1099-0488(20000301)38:53.0.CO;2-P
中图分类号：
学科分类号：
摘要：
The lamellar organization of melt-crystallized β-isotactic polypropylene was studied by atomic force microscopy (AFM) after permanganic etching. Hedritic objects grown at a high crystallization temperature (140-143 °C) were investigated. Essential features of the hedritic development were revealed by the characteristic projections exposed at the sample surface. A three-dimensional view of the morphology was obtained by AFM. Hedritic growth proceeded mainly by branching around screw dislocations resulting in new lamellae that further developed. Successive lamellar layers often diverged. Deviation from the planar lamellar habit was observed, varying with the position within the hedrite. Twisting of the lamellae also was observed occasionally in the vicinity of the screw dislocations.
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