Laser pyrolysis micro-spectroscopy for modelling fire-induced degradation of ethylene-vinyl acetate systems

B. B. Marosfoi, G. Marosi, A. Szabó, B. Vajna, A. Szép

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A recently developed laser pyrolysis (LP)-Raman/ATR micro-spectroscopic method was applied for analyzing the degradation of polymer systems. The concept behind the method is to combine the micro-scale modelling of fire circumstances with analytical monitoring of the chemical changes in the solid phase of the sample. Samples were irradiated with the infrared beam of a CO2 laser. The chemical changes were determined by micro-Raman/ATR spectroscopy methods in 200 ms intervals. The applicability of the method is demonstrated here through the pyrolysis of EVA and EVA composites containing metal-modified clays. Rapid depth profiling of few milligrams of sample is feasible with Raman detection, while the ATR sensor is applicable for analysis of fluorescent samples such as Fe coated sepiolite. The acceleration effect of montmorillonite and sepiolite minerals on the degradation of EVA is more pronounced if their surface is coated with Fe atoms. The effects of laser and the cone heater on the ratio of characteristic Raman bands of the polymer are compared and found to be in good correlation.

Original languageEnglish
Pages (from-to)2231-2238
Number of pages8
JournalPolymer Degradation and Stability
Volume92
Issue number12
DOIs
Publication statusPublished - Dec 2007

Fingerprint

butadiene
extravehicular activity
pyrolysis
acetates
Ethylene
Fires
Pyrolysis
Spectroscopy
degradation
Degradation
Lasers
Polymers
spectroscopy
lasers
Bentonite
Depth profiling
Clay minerals
Minerals
Raman spectroscopy
Cones

Keywords

  • ATR
  • Degradation of EVA
  • Fire modelling
  • Laser pyrolysis
  • Micro-Raman
  • Nanofiller

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Laser pyrolysis micro-spectroscopy for modelling fire-induced degradation of ethylene-vinyl acetate systems. / Marosfoi, B. B.; Marosi, G.; Szabó, A.; Vajna, B.; Szép, A.

In: Polymer Degradation and Stability, Vol. 92, No. 12, 12.2007, p. 2231-2238.

Research output: Contribution to journalArticle

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