Plastic Scintillators via Rapid Photoinitiated Cationic Polymerization of Vinyltoluene

Chandler, Caleb; Porcincula, Dominique H.; Ford, Michael J.; Hook, Connor; Zhang, Xianyi; Brodsky, Jason; Sellinger, Alan

doi:10.1021/acsapm.2c00316

Title: Plastic Scintillators via Rapid Photoinitiated Cationic Polymerization of Vinyltoluene

Journal Article · 16 May 2022 · ACS Applied Polymer Materials

DOI: https://doi.org/10.1021/acsapm.2c00316 · OSTI ID:1878577

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Colorado School of Mines, Golden, CO (United States); Department of Chemistry, Colorado School of Mines
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Colorado School of Mines, Golden, CO (United States)

Cationic photopolymerization is applied for the rapid curing of a vinyltoluene and fluorophore solution into an efficient plastic scintillator. A hard solid is obtained via UV light-initiated polymerization of vinyltoluene, diaryliodonium salt, 9,9-dimethyl-2-phenylfluorene (PhF), and 9,9-dimethyl-2,7-distyrlfluorene (SFS) at ambient conditions with high conversion rates under a range of cationic photoinitiator concentrations, fluorophore concentrations, and light intensities. Insight into photopolymerization kinetics via photo differential scanning calorimetry (photoDSC) revealed photocuring time scales similar to those achieved in a commercial 3D printing resin. Furthermore, scintillator samples prepared cationically performed well compared to samples of equivalent compositions prepared by a lengthy thermally initiated radical polymerization.

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Research Organization:: Georgia Inst. of Technology, Atlanta, GA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA), Office of Defense Nuclear Nonproliferation

Grant/Contract Number:: NA0003921; AC52-07NA27344

OSTI ID:: 1878577

Journal Information:: ACS Applied Polymer Materials, Journal Name: ACS Applied Polymer Materials Journal Issue: 6 Vol. 4; ISSN 2637-6105

Publisher:: ACS PublicationsCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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Title: Plastic Scintillators via Rapid Photoinitiated Cationic Polymerization of Vinyltoluene

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