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

D. Trifonova; Jozsef Varga; Gottfried W. Ehrenstein; Gyula J. Vancso

doi:10.1002/(SICI)1099-0488(20000301)38:5<672::AID-POLB4>3.0.CO;2-P

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

D. Trifonova, Jozsef Varga, Gottfried W. Ehrenstein, Gyula J. Vancso

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Abstract

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.

Original language	Undefined
Pages (from-to)	672-681
Journal	Journal of polymer science. Part B: Polymer physics
Volume	38
Issue number	5
DOIs	https://doi.org/10.1002/(SICI)1099-0488(20000301)38:5<672::AID-POLB4>3.0.CO;2-P
Publication status	Published - 2000

Keywords

Atomic Force Microscopy
lamella curving and splaying
hedrites
IR-71625
Isotactic beta polypropylene

Access to Document

10.1002/(SICI)1099-0488(20000301)38:5<672::AID-POLB4>3.0.CO;2-P

Cite this

Trifonova, D., Varga, J., Ehrenstein, G. W., & Vancso, G. J. (2000). Features of the hedritic morphology of β-isotactic polypropylene studied by atomic force microscopy. Journal of polymer science. Part B: Polymer physics, 38(5), 672-681. https://doi.org/10.1002/(SICI)1099-0488(20000301)38:5<672::AID-POLB4>3.0.CO;2-P

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abstract = "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.",

keywords = "Atomic Force Microscopy, lamella curving and splaying, hedrites, IR-71625, Isotactic beta polypropylene",

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AU - Trifonova, D.

AU - Varga, Jozsef

AU - Ehrenstein, Gottfried W.

AU - Vancso, Gyula J.

PY - 2000

Y1 - 2000

N2 - 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.

AB - 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.

KW - Atomic Force Microscopy

KW - lamella curving and splaying

KW - hedrites

KW - IR-71625

KW - Isotactic beta polypropylene

U2 - 10.1002/(SICI)1099-0488(20000301)38:5<672::AID-POLB4>3.0.CO;2-P

DO - 10.1002/(SICI)1099-0488(20000301)38:5<672::AID-POLB4>3.0.CO;2-P

M3 - Article

VL - 38

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EP - 681

JO - Journal of polymer science. Part B: Polymer physics

JF - Journal of polymer science. Part B: Polymer physics

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