Effect of unidirectional drawing process on fracture behavior of poly(l-lactide)

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

The effects of unidirectional drawing process on fracture behavior of poly(L-lactide) (PLLA), critical J-integral at crack initiation, Jin in the directions perpendicular and parallel to the drawing direction, fracture micromechanism, and surface roughness, R a were investigated. Unidirectional drawing machine was used with variation of draw-ratio from 1 to 2.5 and initial notches were introduced in the direction perpendicular or parallel to the drawing direction. Jin was found to be directly proportional to the draw ratio for the perpendicular direction and inversely proportional for the parallel direction, while similar was the case with R a, suggesting that rough surface formation resulted in high energy dissipation during crack initiation. The elongation and scission of the oriented molecules due to drawing creating rough surface are found to be the primary mechanisms of the toughness improvement due to drawing.

Original languageEnglish
Pages (from-to)1393-1396
Number of pages4
JournalJournal of Materials Science
Volume42
Issue number4
DOIs
Publication statusPublished - Feb 1 2007

Fingerprint

Crack initiation
Toughness
Elongation
Energy dissipation
Surface roughness
Molecules
dilactide
Direction compound

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Effect of unidirectional drawing process on fracture behavior of poly(l-lactide). / Todo, Mitsugu.

In: Journal of Materials Science, Vol. 42, No. 4, 01.02.2007, p. 1393-1396.

Research output: Contribution to journalArticle

@article{042e649f24f6431189937c87b10cf1e6,
title = "Effect of unidirectional drawing process on fracture behavior of poly(l-lactide)",
abstract = "The effects of unidirectional drawing process on fracture behavior of poly(L-lactide) (PLLA), critical J-integral at crack initiation, Jin in the directions perpendicular and parallel to the drawing direction, fracture micromechanism, and surface roughness, R a were investigated. Unidirectional drawing machine was used with variation of draw-ratio from 1 to 2.5 and initial notches were introduced in the direction perpendicular or parallel to the drawing direction. Jin was found to be directly proportional to the draw ratio for the perpendicular direction and inversely proportional for the parallel direction, while similar was the case with R a, suggesting that rough surface formation resulted in high energy dissipation during crack initiation. The elongation and scission of the oriented molecules due to drawing creating rough surface are found to be the primary mechanisms of the toughness improvement due to drawing.",
author = "Mitsugu Todo",
year = "2007",
month = "2",
day = "1",
doi = "10.1007/s10853-006-1312-0",
language = "English",
volume = "42",
pages = "1393--1396",
journal = "Journal of Materials Science",
issn = "0022-2461",
publisher = "Springer Netherlands",
number = "4",

}

TY - JOUR

T1 - Effect of unidirectional drawing process on fracture behavior of poly(l-lactide)

AU - Todo, Mitsugu

PY - 2007/2/1

Y1 - 2007/2/1

N2 - The effects of unidirectional drawing process on fracture behavior of poly(L-lactide) (PLLA), critical J-integral at crack initiation, Jin in the directions perpendicular and parallel to the drawing direction, fracture micromechanism, and surface roughness, R a were investigated. Unidirectional drawing machine was used with variation of draw-ratio from 1 to 2.5 and initial notches were introduced in the direction perpendicular or parallel to the drawing direction. Jin was found to be directly proportional to the draw ratio for the perpendicular direction and inversely proportional for the parallel direction, while similar was the case with R a, suggesting that rough surface formation resulted in high energy dissipation during crack initiation. The elongation and scission of the oriented molecules due to drawing creating rough surface are found to be the primary mechanisms of the toughness improvement due to drawing.

AB - The effects of unidirectional drawing process on fracture behavior of poly(L-lactide) (PLLA), critical J-integral at crack initiation, Jin in the directions perpendicular and parallel to the drawing direction, fracture micromechanism, and surface roughness, R a were investigated. Unidirectional drawing machine was used with variation of draw-ratio from 1 to 2.5 and initial notches were introduced in the direction perpendicular or parallel to the drawing direction. Jin was found to be directly proportional to the draw ratio for the perpendicular direction and inversely proportional for the parallel direction, while similar was the case with R a, suggesting that rough surface formation resulted in high energy dissipation during crack initiation. The elongation and scission of the oriented molecules due to drawing creating rough surface are found to be the primary mechanisms of the toughness improvement due to drawing.

UR - http://www.scopus.com/inward/record.url?scp=33847200096&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33847200096&partnerID=8YFLogxK

U2 - 10.1007/s10853-006-1312-0

DO - 10.1007/s10853-006-1312-0

M3 - Article

AN - SCOPUS:33847200096

VL - 42

SP - 1393

EP - 1396

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 4

ER -