Abstract
Photopolymerized composites are used in a broad range of applications with their performance largely directed by reaction kinetics and contraction accompanying polymerization. Herein, we demonstrate an instrument capable of simultaneously collecting multiple kinetics parameters for a wide range of photopolymerizable systems: degree of conversion (DC), reaction exotherm, and polymerization stress (PS). Our system consists of a cantilever beam-based instrument (tensometer) that has been optimized to capture a large range of stresses. The sample configuration allows the tensometer being coupled to a fast near infrared (NIR) spectrometer collecting spectra in transmission. Using our instrument design, simultaneous measurements of PS, DC, and exotherm are performed, for the first time, on a commercial composite with ~80 % (by mass) silica particle fillers. This new system is expected to provide new insights into kinetics and property relationships for photopolymerized composites.
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Acknowledgement
Financial support by Interagency Agreement between the National Institute of Dental and Craniofacial Research and the National Institute of Standards and Technology, NIH/NIDCR [Y1-DE-7005-01].
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Wang, Z., Landis, F.A., Giuseppetti, A.A.M., Lin-Gibson, S., Chiang, M.Y.M. (2016). Simultaneous Measurement of Polymerization Stress Evolution, Conversion Kinetics, and Exotherm in Real-Time. In: Sciammarella, C., Considine, J., Gloeckner, P. (eds) Experimental and Applied Mechanics, Volume 4. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-22449-7_18
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DOI: https://doi.org/10.1007/978-3-319-22449-7_18
Publisher Name: Springer, Cham
Print ISBN: 978-3-319-22448-0
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