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PVT Degradation Studies [electronic resource] : NMR Analysis

Published:
Washington, D.C. : United States. Dept. of Energy, 2017.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
20 pages : digital, PDF file
Additional Creators:
Pacific Northwest National Laboratory (U.S.), United States. Department of Energy, United States. Department of Homeland Security, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Under certain environmental conditions, polyvinyl toluene (PVT) plastic scintillator has been observed to undergo internal fogging. Nuclear magnetic resonance spectroscopy has been used to elucidate the state of water inside the PVT. The deuterium NMR results show that water absorbed by PVT under warm, humid conditions enters several distinct environments, and when the PVT is transferred from incubation to ambient temperature and humidity the water is lost on a time scale of a few hours from these samples. Most of the deuterium NMR peaks can be assigned to bulk liquid water, but almost 35% of the detected signal intensity is contained in a resonance that resembles spectra of water contained in nanometer-scale pores in mesoporous carbon.
Report Numbers:
E 1.99:pnnl--26530
pnnl--26530
Subject(s):
Other Subject(s):
Note:
Published through SciTech Connect.
06/06/2017.
"pnnl--26530"
"830403000"
Herman M. Cho; Richard T. Kouzes.
Funding Information:
AC05-76RL01830
View MARC record | catkey: 24044282