Micromorphologic feature of the crystallization of isotactic polypropylene after melt-shearing

Chang Mou Wu, Ming Chen, J. Karger-Kocsis

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The formation of β-cylindritic micromorphologic structure produced by pulling a Kevlar fiber from an isothermal crystallizing β-nucleated isotactic polypropylene melt (at Tc=133°C) has been studied by using polarized light microscope, phase contrast optical microscope, scanning electron and atomic force microscopes. The micrographs reveal a clearly interfacial shear zone, α-cylindrite, β-cylindrite and β-spherulites near the sheared layer. Some of the point-like β-nuclei was not originated from the surface of the interfacial shear zone. A modified model based upon the theory of shear-induced crystallization can explain the phenomenon of polymorphic structure and the boundary shape near the interface without assuming epitaxial growth.

Original languageEnglish
Pages (from-to)493-499
Number of pages7
JournalPolymer Bulletin
Volume41
Issue number4
Publication statusPublished - Oct 1998

Fingerprint

Polypropylenes
Crystallization
shearing
polypropylene
Shearing
Microscopes
crystallization
shear
microscopes
Kevlar (trademark)
spherulites
pulling
phase contrast
Light polarization
optical microscopes
Epitaxial growth
polarized light
Scanning
nuclei
scanning

ASJC Scopus subject areas

  • Materials Chemistry
  • Polymers and Plastics

Cite this

Micromorphologic feature of the crystallization of isotactic polypropylene after melt-shearing. / Wu, Chang Mou; Chen, Ming; Karger-Kocsis, J.

In: Polymer Bulletin, Vol. 41, No. 4, 10.1998, p. 493-499.

Research output: Contribution to journalArticle

@article{e6053a60ab7c4e49b357f13eaef174aa,
title = "Micromorphologic feature of the crystallization of isotactic polypropylene after melt-shearing",
abstract = "The formation of β-cylindritic micromorphologic structure produced by pulling a Kevlar fiber from an isothermal crystallizing β-nucleated isotactic polypropylene melt (at Tc=133°C) has been studied by using polarized light microscope, phase contrast optical microscope, scanning electron and atomic force microscopes. The micrographs reveal a clearly interfacial shear zone, α-cylindrite, β-cylindrite and β-spherulites near the sheared layer. Some of the point-like β-nuclei was not originated from the surface of the interfacial shear zone. A modified model based upon the theory of shear-induced crystallization can explain the phenomenon of polymorphic structure and the boundary shape near the interface without assuming epitaxial growth.",
author = "Wu, {Chang Mou} and Ming Chen and J. Karger-Kocsis",
year = "1998",
month = "10",
language = "English",
volume = "41",
pages = "493--499",
journal = "Polymer Bulletin",
issn = "0170-0839",
publisher = "Springer Verlag",
number = "4",

}

TY - JOUR

T1 - Micromorphologic feature of the crystallization of isotactic polypropylene after melt-shearing

AU - Wu, Chang Mou

AU - Chen, Ming

AU - Karger-Kocsis, J.

PY - 1998/10

Y1 - 1998/10

N2 - The formation of β-cylindritic micromorphologic structure produced by pulling a Kevlar fiber from an isothermal crystallizing β-nucleated isotactic polypropylene melt (at Tc=133°C) has been studied by using polarized light microscope, phase contrast optical microscope, scanning electron and atomic force microscopes. The micrographs reveal a clearly interfacial shear zone, α-cylindrite, β-cylindrite and β-spherulites near the sheared layer. Some of the point-like β-nuclei was not originated from the surface of the interfacial shear zone. A modified model based upon the theory of shear-induced crystallization can explain the phenomenon of polymorphic structure and the boundary shape near the interface without assuming epitaxial growth.

AB - The formation of β-cylindritic micromorphologic structure produced by pulling a Kevlar fiber from an isothermal crystallizing β-nucleated isotactic polypropylene melt (at Tc=133°C) has been studied by using polarized light microscope, phase contrast optical microscope, scanning electron and atomic force microscopes. The micrographs reveal a clearly interfacial shear zone, α-cylindrite, β-cylindrite and β-spherulites near the sheared layer. Some of the point-like β-nuclei was not originated from the surface of the interfacial shear zone. A modified model based upon the theory of shear-induced crystallization can explain the phenomenon of polymorphic structure and the boundary shape near the interface without assuming epitaxial growth.

UR - http://www.scopus.com/inward/record.url?scp=0011115753&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0011115753&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0011115753

VL - 41

SP - 493

EP - 499

JO - Polymer Bulletin

JF - Polymer Bulletin

SN - 0170-0839

IS - 4

ER -