Changes in the Optical Properties of Rubber Exposed to High-Pressure Hydrogen Using Pulsed Terahertz Waves

In this study, we investigated how high-temperature, high-pressure hydrogen affects the optical properties of three kinds of sealing rubber (chloroprene rubber, ethylene propylene diene monomer, and acrylonitrile butadiene rubber) using pulsed terahertz waves. The optical properties of the rubber sa...

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Bibliographic Details
Published in:Polymers 2023-11, Vol.15 (23), p.4530
Main Authors: Hwang, Mun-Young, Lee, Hyun Chul, Yang, Hyeok-Jae, Han, Dae-Hyun
Format: Article
Language:English
Subjects:
Acrylonitrile
Butadiene
Emission standards
Ethylene
Exposure
Fourier transforms
Fuel cell vehicles
Heat resistance
High density polyethylenes
High pressure
High temperature
Hydrogen
Infrared spectroscopy
Laser damage
Microscopy
NMR
Nondestructive testing
Nuclear magnetic resonance
Optical properties
Ozone
Permeability
Pressure vessels
Propylene
Raman spectra
Raman spectroscopy
Refractivity
Rubber
Sealing
Signal quality
Spectrum analysis
Temperature
Terahertz frequencies
VOCs
Volatile organic compounds
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Summary:In this study, we investigated how high-temperature, high-pressure hydrogen affects the optical properties of three kinds of sealing rubber (chloroprene rubber, ethylene propylene diene monomer, and acrylonitrile butadiene rubber) using pulsed terahertz waves. The optical properties of the rubber samples were analyzed before and after exposure to hydrogen (80 °C and 200 bar) for 72 h. The results showed that the terahertz waves had a shorter time delay and a lower signal intensity for all rubber types. The exposure response intensity, refractive index, and absorption rate also changed in the frequency domain. Raman and Fourier transform infrared spectroscopy were used for comparison, and a few peak shifts were observed. However, the Raman spectra had low signal quality, and the laser damaged the specimen. The study demonstrates that terahertz waves can be used as a non-contact non-destructive testing technique to evaluate the changes in sealing rubbers after hydrogen exposure.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym15234530