Effect of thermal and hygrothermal aging on the plane stress fracture toughness of poly(ethylene terephthalate) sheets

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27 Citations (Scopus)

Abstract

The in-plane (plane stress) fracture toughness of two polyester (PET, PETG) sheets were assessed using the essential work of fracture (EWF) method after thermal and hygrothermal aging performed just below glass temperature. This ensured that physical aging takes place. On the aged sheets the yield stress (σy), enthalpy relaxation (ΔH) and EWF parameters were determined. It was observed that the essential work of fracture component related to the specific yielding (we,y) is suitable for assessing physical aging-independently of the humidity content. A good linear correlations exists between we,y, σy and ΔH.

Original languageEnglish
Pages (from-to)180-187
Number of pages8
JournalExpress Polymer Letters
Volume1
Issue number3
DOIs
Publication statusPublished - Mar 2007

Fingerprint

plane stress
Polyethylene Terephthalates
polyethylene terephthalate
fracture strength
Polyethylene terephthalates
Fracture toughness
Aging of materials
Polyesters
polyesters
Yield stress
humidity
Enthalpy
Atmospheric humidity
enthalpy
Glass
glass
Hot Temperature
Temperature
temperature

Keywords

  • Essential work of fracture (EWF)
  • Fracture and fatigue
  • Fracture toughness
  • Hygrothermal aging
  • Physical aging

ASJC Scopus subject areas

  • Polymers and Plastics
  • Materials Chemistry
  • Chemical Engineering(all)
  • Organic Chemistry
  • Physical and Theoretical Chemistry

Cite this

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title = "Effect of thermal and hygrothermal aging on the plane stress fracture toughness of poly(ethylene terephthalate) sheets",
abstract = "The in-plane (plane stress) fracture toughness of two polyester (PET, PETG) sheets were assessed using the essential work of fracture (EWF) method after thermal and hygrothermal aging performed just below glass temperature. This ensured that physical aging takes place. On the aged sheets the yield stress (σy), enthalpy relaxation (ΔH) and EWF parameters were determined. It was observed that the essential work of fracture component related to the specific yielding (we,y) is suitable for assessing physical aging-independently of the humidity content. A good linear correlations exists between we,y, σy and ΔH.",
keywords = "Essential work of fracture (EWF), Fracture and fatigue, Fracture toughness, Hygrothermal aging, Physical aging",
author = "T. B{\'a}r{\'a}ny and E. F{\"o}ldes and T. Czig{\'a}ny",
year = "2007",
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T1 - Effect of thermal and hygrothermal aging on the plane stress fracture toughness of poly(ethylene terephthalate) sheets

AU - Bárány, T.

AU - Földes, E.

AU - Czigány, T.

PY - 2007/3

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N2 - The in-plane (plane stress) fracture toughness of two polyester (PET, PETG) sheets were assessed using the essential work of fracture (EWF) method after thermal and hygrothermal aging performed just below glass temperature. This ensured that physical aging takes place. On the aged sheets the yield stress (σy), enthalpy relaxation (ΔH) and EWF parameters were determined. It was observed that the essential work of fracture component related to the specific yielding (we,y) is suitable for assessing physical aging-independently of the humidity content. A good linear correlations exists between we,y, σy and ΔH.

AB - The in-plane (plane stress) fracture toughness of two polyester (PET, PETG) sheets were assessed using the essential work of fracture (EWF) method after thermal and hygrothermal aging performed just below glass temperature. This ensured that physical aging takes place. On the aged sheets the yield stress (σy), enthalpy relaxation (ΔH) and EWF parameters were determined. It was observed that the essential work of fracture component related to the specific yielding (we,y) is suitable for assessing physical aging-independently of the humidity content. A good linear correlations exists between we,y, σy and ΔH.

KW - Essential work of fracture (EWF)

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KW - Fracture toughness

KW - Hygrothermal aging

KW - Physical aging

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