Photodegradation of polycarbonate under narrow band irradiation at 172 nm

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Photostability of polymers is an important issue since most polymers tend to loose their original properties upon exposure to light, especially to ultraviolet radiation. Polycarbonates are widely used industrial materials because of their excellent properties, which includes transparency, high tensile strength, impact resistance and rigidity. In this paper, we present results on 172nm photodegradation of polycarbonate (PC) films. PC films of 50μm thickness were irradiated for up to 20min using a Xe2* excimer lamp system. Ex situ UV visible spectroscopic investigation of the treated films revealed the appearance of two strong absorption bands at 279 and 317nm and a third broad band centred around 380nm whose intensity increased linearly with illumination time. The morphological changes were characterised by atomic force microscopy and resulted in a gradually increasing roughness, being a linear function of irradiation time. The interpretation of the observed chemical degradation is based on attenuated total reflection IR and X-ray photoelectron spectroscopic measurements which show cleavage of the aromatic C-C and carboxylic CO-O bonds together with some nitrogen incorporation into the surface layer of the irradiated films.

Original languageEnglish
Pages (from-to)85-90
Number of pages6
JournalApplied Surface Science
Volume186
Issue number1-4
DOIs
Publication statusPublished - Jan 28 2002

Fingerprint

polycarbonate
Photodegradation
polycarbonates
Polycarbonates
narrowband
Irradiation
irradiation
Polymers
impact resistance
Impact resistance
polymers
excimers
Carbon Monoxide
Photoelectrons
Electric lamps
rigidity
Ultraviolet radiation
Rigidity
ultraviolet radiation
Transparency

Keywords

  • Excimer lamp
  • Photodegradation
  • Polycarbonate
  • Vacuum ultraviolet

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Condensed Matter Physics

Cite this

Photodegradation of polycarbonate under narrow band irradiation at 172 nm. / Geretovszky, Zs; Hopp, B.; Bertóti, I.; Boyd, I. W.

In: Applied Surface Science, Vol. 186, No. 1-4, 28.01.2002, p. 85-90.

Research output: Contribution to journalArticle

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