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Title: PVT Degradation Studies: NMR Analysis

Abstract

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.

Authors:
 [1];  [1]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE; Dept. of Homeland Security (DHS) (United States)
OSTI Identifier:
1411933
Report Number(s):
PNNL-26530
830403000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; PVT; NMR spectrometry; PVT degradation

Citation Formats

Cho, Herman M., and Kouzes, Richard T. PVT Degradation Studies: NMR Analysis. United States: N. p., 2017. Web. doi:10.2172/1411933.
Cho, Herman M., & Kouzes, Richard T. PVT Degradation Studies: NMR Analysis. United States. doi:10.2172/1411933.
Cho, Herman M., and Kouzes, Richard T. Tue . "PVT Degradation Studies: NMR Analysis". United States. doi:10.2172/1411933. https://www.osti.gov/servlets/purl/1411933.
@article{osti_1411933,
title = {PVT Degradation Studies: NMR Analysis},
author = {Cho, Herman M. and Kouzes, Richard T.},
abstractNote = {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.},
doi = {10.2172/1411933},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 06 00:00:00 EDT 2017},
month = {Tue Jun 06 00:00:00 EDT 2017}
}

Technical Report:

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