Journal article
In Situ NMR to Monitor Bulk Photopolymerization Kinetics
ACS macro letters, Vol.14, pp.847-852
06/04/2025
DOI: 10.1021/acsmacrolett.5c00171
PMCID: PMC12177938
PMID: 40465866
Appears in UI Libraries Support Open Access
Abstract
The ability to precisely measure photopolymerization kinetics is paramount to controlling curing characteristics and material properties in photocurable systems. Traditional methods used to measure kinetics, such as real-time Fourier-transform infrared spectroscopy (RT-IR), are often limited by broadening mechanisms intrinsic to the system and poor spectral resolution. In this work, we present an
NMR spectroscopy technique to monitor bulk photopolymerization reactions wherein the polymer system is separated from the locking solvent via a capillary insert and photoexcited using an LED-coupled fiber optic. This technique allows for the isolated observation of the bulk reaction system while also benefiting from the high spectral resolution and rich chemical information offered by NMR. Relative rate constants (
') and ultimate monomer conversion were determined for four systems: neat hexyl acrylate, isobornyl methacrylate,
,
-dimethylacrylamide, and hexyl acrylate with cross-linker. By observing kinetic data of simple photopolymer systems, this work demonstrates the utility of
NMR photopolymerization as a complementary technique to conventional RT-IR and other methods for the kinetic monitoring of bulk photopolymer materials.
Details
- Title: Subtitle
- In Situ NMR to Monitor Bulk Photopolymerization Kinetics
- Creators
- Luis L Jessen - University of IowaKameron R Hansen - University of IowaGeorge B Crull - University of IowaTanner L Grover - University of IowaC Allan Guymon - Brigham Young University
- Resource Type
- Journal article
- Publication Details
- ACS macro letters, Vol.14, pp.847-852
- DOI
- 10.1021/acsmacrolett.5c00171
- PMID
- 40465866
- PMCID
- PMC12177938
- NLM abbreviation
- ACS Macro Lett
- ISSN
- 2161-1653
- eISSN
- 2161-1653
- Publisher
- American Chemical Society
- Copyright
- Copyright © 2025 The Authors
- Grant note
- Industry University Cooperative Research Center for Fundamentals and Applications of PhotopolymerizationIndustry/University Cooperative Research Center (I/UCRC) for Fundamentals and Applications of Photopolymerization
Financial support for this work was provided by the Industry/University Cooperative Research Center (I/UCRC) for Fundamentals and Applications of Photopolymerization.
- Language
- English
- Date published
- 06/04/2025
- Academic Unit
- Chemistry; Chemical and Biochemical Engineering
- Record Identifier
- 9984828224402771
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