Photopolymerization monitoring of ceramic stereolithography resins by FTIR methods

Curing kinetics of UV photocurable acrylate monomer-based ceramic resins were studied using a Fourier Transform Infrared (FTIR) spectroscopy instrument with an internally-mounted UV-curing source, providing real-time quantification of the acrylate double bond conversion with respect to increasing UV...

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Bibliographic Details
Published in:Journal of materials science 2005, Vol.40 (1), p.71-76
Main Authors: WU, K. C, HALLORAN, J. W
Format: Article
Language:English
Subjects:
Acrylates
Applied sciences
Ceramics
Composites
Conversion
Curing
Exact sciences and technology
Forms of application and semi-finished materials
Fourier transforms
Infrared instruments
Infrared spectroscopy
Kinetics
Lithography
Materials science
Photopolymerization
Polymer industry, paints, wood
Polymers
Real time
Resins
Surface chemistry
Technology of polymers
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Summary:Curing kinetics of UV photocurable acrylate monomer-based ceramic resins were studied using a Fourier Transform Infrared (FTIR) spectroscopy instrument with an internally-mounted UV-curing source, providing real-time quantification of the acrylate double bond conversion with respect to increasing UV dose. The results show that this Real Time FTIR experiment (RTFTIR) provides a simple but valuable means of investigating average photopolymerization kinetics and final conversion in a thin layer of highly loaded ceramic suspension. This RTFTIR technique showed complete agreement with differential photo-calorimetry (photoDSC) experiments performed on the same thickness and amount highly loaded ceramic suspension.FTIR was also used to investigate the curing behavior inside sublayers of the same ceramic suspension. Curing kinetics and final conversion were monitored in these layers, with higher conversion and faster kinetics being observed near the exposed surface. Due to the scattering and absorption effects within the uppermost layers, photopolymerization rate and percent conversion declined as a function of depth from the surface.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-005-5689-y