Measurement of Beer-Lambert Attenuation Coefficient and Curing Kinetics Power Order: A Method Based on Rapid-Scan FTIR During Laser Curing on an ATR

Wenlong Li, Florian Batteux, Steven Araujo, Nicolas Delpouve, Jean Marc Saiter, Li Tan, Mehrdad Negahban

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

When photo curing a polymer system, one immediately becomes concerned with the depth of penetration of light into the system and how it affects the uniformity of the curing process. The attenuation of light is related to the Beer-Lambert law of light penetration into the system, and its influence on the curing depends on the role of light intensity on the curing kinetics. The attenuation coefficient of the Beer-Lambert law can be measured by direct light power measurements for light passing through different thicknesses of the material. In this article we show how the curing kinetics measured by following changes in the infrared light spectra obtained from rapid-scan FTIR can be used to obtain both the Beer-Lambert attenuation coefficient and the power factor, indicating the nonlinear influence of the light power on the curing process. The method is demonstrated for the photo curing of an acrylate cross-linker, and verified using direct power measurement.

Original languageEnglish (US)
Pages (from-to)173-179
Number of pages7
JournalMacromolecular Symposia
Volume365
Issue number1
DOIs
StatePublished - Jul 1 2016

Keywords

  • Beer-Lambert
  • FTIR
  • acrylate
  • attenuation
  • kinetics
  • photo curing

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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