Effect of UV aging on the tensile and fracture mechanical response of syndiotactic polypropylenes of various crystallinity

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Syndiotactic polypropylene (sPP) sheets of various crystallinities were subjected to accelerated ultraviolet (UV) aging. The chemical modification of the polymer was followed by FTIR spectroscopy measuring the carbonyl index in transmittance (film) and diffuse reflectance (powder) modes. Both the tensile stress and strain, suitable indicators of the UV aging, charged linearly with the carbonyl index in semilogarithmic representation. The essential work of fracture (EWF) method proved to be less suitable for characterization, as the UV irradiation resulted in surface embrittlement of the polymer. This caused brittle fracture of the notched specimens instead of the required ductile one. On the other hand, the term of the specific work of fracture related to yielding may adequately reflect the structural and morphological changes of sPP caused by UV irradiation.

Original languageEnglish
Pages (from-to)3462-3469
Number of pages8
JournalJournal of Applied Polymer Science
Volume91
Issue number6
Publication statusPublished - Mar 15 2004

Fingerprint

Polypropylenes
Polymers
Aging of materials
Irradiation
Tensile strain
Chemical modification
Brittle fracture
Embrittlement
Tensile stress
Powders
Spectroscopy

Keywords

  • Degradation
  • Fracture
  • FT-IR
  • Syndiotactic poly(propylene)
  • UV radiation

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

@article{832222b6985b4c8a87a595fc3cce32f7,
title = "Effect of UV aging on the tensile and fracture mechanical response of syndiotactic polypropylenes of various crystallinity",
abstract = "Syndiotactic polypropylene (sPP) sheets of various crystallinities were subjected to accelerated ultraviolet (UV) aging. The chemical modification of the polymer was followed by FTIR spectroscopy measuring the carbonyl index in transmittance (film) and diffuse reflectance (powder) modes. Both the tensile stress and strain, suitable indicators of the UV aging, charged linearly with the carbonyl index in semilogarithmic representation. The essential work of fracture (EWF) method proved to be less suitable for characterization, as the UV irradiation resulted in surface embrittlement of the polymer. This caused brittle fracture of the notched specimens instead of the required ductile one. On the other hand, the term of the specific work of fracture related to yielding may adequately reflect the structural and morphological changes of sPP caused by UV irradiation.",
keywords = "Degradation, Fracture, FT-IR, Syndiotactic poly(propylene), UV radiation",
author = "T. B{\'a}r{\'a}ny and E. F{\"o}ldes and T. Czig{\'a}ny and J. Karger-Kocsis",
year = "2004",
month = "3",
day = "15",
language = "English",
volume = "91",
pages = "3462--3469",
journal = "Journal of Applied Polymer Science",
issn = "0021-8995",
publisher = "John Wiley and Sons Inc.",
number = "6",

}

TY - JOUR

T1 - Effect of UV aging on the tensile and fracture mechanical response of syndiotactic polypropylenes of various crystallinity

AU - Bárány, T.

AU - Földes, E.

AU - Czigány, T.

AU - Karger-Kocsis, J.

PY - 2004/3/15

Y1 - 2004/3/15

N2 - Syndiotactic polypropylene (sPP) sheets of various crystallinities were subjected to accelerated ultraviolet (UV) aging. The chemical modification of the polymer was followed by FTIR spectroscopy measuring the carbonyl index in transmittance (film) and diffuse reflectance (powder) modes. Both the tensile stress and strain, suitable indicators of the UV aging, charged linearly with the carbonyl index in semilogarithmic representation. The essential work of fracture (EWF) method proved to be less suitable for characterization, as the UV irradiation resulted in surface embrittlement of the polymer. This caused brittle fracture of the notched specimens instead of the required ductile one. On the other hand, the term of the specific work of fracture related to yielding may adequately reflect the structural and morphological changes of sPP caused by UV irradiation.

AB - Syndiotactic polypropylene (sPP) sheets of various crystallinities were subjected to accelerated ultraviolet (UV) aging. The chemical modification of the polymer was followed by FTIR spectroscopy measuring the carbonyl index in transmittance (film) and diffuse reflectance (powder) modes. Both the tensile stress and strain, suitable indicators of the UV aging, charged linearly with the carbonyl index in semilogarithmic representation. The essential work of fracture (EWF) method proved to be less suitable for characterization, as the UV irradiation resulted in surface embrittlement of the polymer. This caused brittle fracture of the notched specimens instead of the required ductile one. On the other hand, the term of the specific work of fracture related to yielding may adequately reflect the structural and morphological changes of sPP caused by UV irradiation.

KW - Degradation

KW - Fracture

KW - FT-IR

KW - Syndiotactic poly(propylene)

KW - UV radiation

UR - http://www.scopus.com/inward/record.url?scp=17644436254&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=17644436254&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:17644436254

VL - 91

SP - 3462

EP - 3469

JO - Journal of Applied Polymer Science

JF - Journal of Applied Polymer Science

SN - 0021-8995

IS - 6

ER -