New Aspects of Degradation in Silicone Rubber under UVA and UVB Irradiation: A Gas Chromatography–Mass Spectrometry Study
Abstract
:1. Introduction
2. Experiments
2.1. Materials Preparation
2.2. Ultraviolet Irradiation
2.3. Extraction of the Uncrosslinked Siloxanes
2.4. GC–MS and GC Analysis
2.5. Positron Annihilation Lifetime Spectroscopy
3. Results and Discussion
3.1. Extracts in Silicone Rubber Identified by GC–MS
3.2. Quantitative Analysis of Extracts in Silicone Rubber Irradiated by Sunlight UV
3.3. Free Volumes Characterized by PALS
3.4. Aging Mechanism of Silicone Rubber under UVA/UVB Irradiation
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Raw Material Type | Raw Material Name | Weight | Percentage |
---|---|---|---|
(phr) | (wt.%) | ||
organic component | methyl-terminated PDMS | 100 | 46.51 |
inorganic fillers | aluminum hydroxide (ATH) | 70 | 32.56 |
amorphous silica (SiO) | 25 | 11.63 | |
zinc oxide (ZnO) | 2 | 0.93 | |
assistant additives | hydride-functional silicone oil | 10 | 2.79 |
silane coupling agent | 6 | 4.65 | |
2,5-dimethyl-2,5-di(tert-butylperoxy) | 2 | 0.93 |
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Wang, Z.; Qian, L.; Peng, X.; Huang, Z.; Yang, Y.; He, C.; Fang, P. New Aspects of Degradation in Silicone Rubber under UVA and UVB Irradiation: A Gas Chromatography–Mass Spectrometry Study. Polymers 2021, 13, 2215. https://doi.org/10.3390/polym13132215
Wang Z, Qian L, Peng X, Huang Z, Yang Y, He C, Fang P. New Aspects of Degradation in Silicone Rubber under UVA and UVB Irradiation: A Gas Chromatography–Mass Spectrometry Study. Polymers. 2021; 13(13):2215. https://doi.org/10.3390/polym13132215
Chicago/Turabian StyleWang, Zheng, Libing Qian, Xiangyang Peng, Zhen Huang, Yue Yang, Chunqing He, and Pengfei Fang. 2021. "New Aspects of Degradation in Silicone Rubber under UVA and UVB Irradiation: A Gas Chromatography–Mass Spectrometry Study" Polymers 13, no. 13: 2215. https://doi.org/10.3390/polym13132215