Scanning force microscopic study of polyethylene single crystals prepared by a self-seeding method

Tomokazu Fujii, Atsushi Takahara, Tisato Kajiyama

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The surface structures of high-density polyethylene (HDPE) single crystals with weight average molecular weight, Mw=32k, 120k and 520k prepared by a self-seeding method were investigated by atomic force microscopy (AFM) and lateral force microscopy (LFM). A characteristic lozenge shape lamellar crystal of ca. 12 nm thick was observed with AFM. The contrast of lateral force of the HDPE single crystal in LFM images was observed between adjacent sectors, which means that the chain folding directions were different. The magnitude of lateral force in LFM measurement increased with scanning angle, θ, which was defined as the angle between scanning direction of the cantilever and {110}, that is the growth face of the HDPE single crystal. These results indicate that the surfaces of the HDPE single crystals prepared by a self-seeding method exhibit regular sharp chain folding along {110} at the surface. Furthermore, it was suggested that the folding structure of the HDPE single crystal surface might depend on the crystallization methods, such as isothermal crystallization or self-seeding one.

Original languageEnglish
Pages (from-to)336-345
Number of pages10
JournalACS Symposium Series
Volume741
Publication statusPublished - 1999

Fingerprint

Polyethylene
High density polyethylenes
Polyethylenes
Single crystals
Scanning
Microscopic examination
Crystallization
Atomic force microscopy
Single crystal surfaces
Surface structure
Molecular weight
Crystals
Direction compound

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Scanning force microscopic study of polyethylene single crystals prepared by a self-seeding method. / Fujii, Tomokazu; Takahara, Atsushi; Kajiyama, Tisato.

In: ACS Symposium Series, Vol. 741, 1999, p. 336-345.

Research output: Contribution to journalArticle

@article{87296b8d0c244d9497d3af6467d18f7a,
title = "Scanning force microscopic study of polyethylene single crystals prepared by a self-seeding method",
abstract = "The surface structures of high-density polyethylene (HDPE) single crystals with weight average molecular weight, Mw=32k, 120k and 520k prepared by a self-seeding method were investigated by atomic force microscopy (AFM) and lateral force microscopy (LFM). A characteristic lozenge shape lamellar crystal of ca. 12 nm thick was observed with AFM. The contrast of lateral force of the HDPE single crystal in LFM images was observed between adjacent sectors, which means that the chain folding directions were different. The magnitude of lateral force in LFM measurement increased with scanning angle, θ, which was defined as the angle between scanning direction of the cantilever and {110}, that is the growth face of the HDPE single crystal. These results indicate that the surfaces of the HDPE single crystals prepared by a self-seeding method exhibit regular sharp chain folding along {110} at the surface. Furthermore, it was suggested that the folding structure of the HDPE single crystal surface might depend on the crystallization methods, such as isothermal crystallization or self-seeding one.",
author = "Tomokazu Fujii and Atsushi Takahara and Tisato Kajiyama",
year = "1999",
language = "English",
volume = "741",
pages = "336--345",
journal = "ACS Symposium Series",
issn = "0097-6156",
publisher = "American Chemical Society",

}

TY - JOUR

T1 - Scanning force microscopic study of polyethylene single crystals prepared by a self-seeding method

AU - Fujii, Tomokazu

AU - Takahara, Atsushi

AU - Kajiyama, Tisato

PY - 1999

Y1 - 1999

N2 - The surface structures of high-density polyethylene (HDPE) single crystals with weight average molecular weight, Mw=32k, 120k and 520k prepared by a self-seeding method were investigated by atomic force microscopy (AFM) and lateral force microscopy (LFM). A characteristic lozenge shape lamellar crystal of ca. 12 nm thick was observed with AFM. The contrast of lateral force of the HDPE single crystal in LFM images was observed between adjacent sectors, which means that the chain folding directions were different. The magnitude of lateral force in LFM measurement increased with scanning angle, θ, which was defined as the angle between scanning direction of the cantilever and {110}, that is the growth face of the HDPE single crystal. These results indicate that the surfaces of the HDPE single crystals prepared by a self-seeding method exhibit regular sharp chain folding along {110} at the surface. Furthermore, it was suggested that the folding structure of the HDPE single crystal surface might depend on the crystallization methods, such as isothermal crystallization or self-seeding one.

AB - The surface structures of high-density polyethylene (HDPE) single crystals with weight average molecular weight, Mw=32k, 120k and 520k prepared by a self-seeding method were investigated by atomic force microscopy (AFM) and lateral force microscopy (LFM). A characteristic lozenge shape lamellar crystal of ca. 12 nm thick was observed with AFM. The contrast of lateral force of the HDPE single crystal in LFM images was observed between adjacent sectors, which means that the chain folding directions were different. The magnitude of lateral force in LFM measurement increased with scanning angle, θ, which was defined as the angle between scanning direction of the cantilever and {110}, that is the growth face of the HDPE single crystal. These results indicate that the surfaces of the HDPE single crystals prepared by a self-seeding method exhibit regular sharp chain folding along {110} at the surface. Furthermore, it was suggested that the folding structure of the HDPE single crystal surface might depend on the crystallization methods, such as isothermal crystallization or self-seeding one.

UR - http://www.scopus.com/inward/record.url?scp=0042412098&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0042412098&partnerID=8YFLogxK

M3 - Article

VL - 741

SP - 336

EP - 345

JO - ACS Symposium Series

JF - ACS Symposium Series

SN - 0097-6156

ER -