The effects of gamma irradiation on RTV polysiloxane foams
Abstract
The present paper involves the investigation of ionizing radiation effects on silica filled poly (dimethyl siloxane) foam vulcanized at room temperature. In order to better predict aging effects in these materials, it is important to understand the influence of irradiation on structural-rheological property relationships. Polysiloxane foams were subjected to moderate doses of gamma irradiation in an inert atmosphere and characterized by thermal (DSC and TGA), chemical (FT-IR, NMR, Mössbauer, mass spectroscopy, EPR, solvent swelling), microscopy (SEM and AFM), and mechanical (uniaxial compressive load) techniques. Radiation exposure induced cross-linking reactions that predominated over chain scission reactions for the dose range investigated. No long-lived radiation-induced radicals were detected and the porous structure of the irradiated foam remained unchanged. Finally, radiation exposure resulted in gas evolution, decrease in crystallization levels, slight changes in chemistry, and decrease in the molecular weight between cross-links, thereby hardening the foam.
- Authors:
-
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1467363
- Alternate Identifier(s):
- OSTI ID: 1245238
- Report Number(s):
- LA-UR-14-28787
Journal ID: ISSN 0141-3910
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Polymer Degradation and Stability
- Additional Journal Information:
- Journal Volume: 117; Journal ID: ISSN 0141-3910
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; polysiloxanes, gamma irradiation, RTV, foams
Citation Formats
Labouriau, Andrea, Cady, Carl, Gill, John, Taylor, Dean, Zocco, Adam, Stull, Jamie, Henderson, Kevin, and Wrobleski, Debra. The effects of gamma irradiation on RTV polysiloxane foams. United States: N. p., 2015.
Web. doi:10.1016/j.polymdegradstab.2015.03.021.
Labouriau, Andrea, Cady, Carl, Gill, John, Taylor, Dean, Zocco, Adam, Stull, Jamie, Henderson, Kevin, & Wrobleski, Debra. The effects of gamma irradiation on RTV polysiloxane foams. United States. https://doi.org/10.1016/j.polymdegradstab.2015.03.021
Labouriau, Andrea, Cady, Carl, Gill, John, Taylor, Dean, Zocco, Adam, Stull, Jamie, Henderson, Kevin, and Wrobleski, Debra. Sat .
"The effects of gamma irradiation on RTV polysiloxane foams". United States. https://doi.org/10.1016/j.polymdegradstab.2015.03.021. https://www.osti.gov/servlets/purl/1467363.
@article{osti_1467363,
title = {The effects of gamma irradiation on RTV polysiloxane foams},
author = {Labouriau, Andrea and Cady, Carl and Gill, John and Taylor, Dean and Zocco, Adam and Stull, Jamie and Henderson, Kevin and Wrobleski, Debra},
abstractNote = {The present paper involves the investigation of ionizing radiation effects on silica filled poly (dimethyl siloxane) foam vulcanized at room temperature. In order to better predict aging effects in these materials, it is important to understand the influence of irradiation on structural-rheological property relationships. Polysiloxane foams were subjected to moderate doses of gamma irradiation in an inert atmosphere and characterized by thermal (DSC and TGA), chemical (FT-IR, NMR, Mössbauer, mass spectroscopy, EPR, solvent swelling), microscopy (SEM and AFM), and mechanical (uniaxial compressive load) techniques. Radiation exposure induced cross-linking reactions that predominated over chain scission reactions for the dose range investigated. No long-lived radiation-induced radicals were detected and the porous structure of the irradiated foam remained unchanged. Finally, radiation exposure resulted in gas evolution, decrease in crystallization levels, slight changes in chemistry, and decrease in the molecular weight between cross-links, thereby hardening the foam.},
doi = {10.1016/j.polymdegradstab.2015.03.021},
journal = {Polymer Degradation and Stability},
number = ,
volume = 117,
place = {United States},
year = {Sat Apr 04 00:00:00 EDT 2015},
month = {Sat Apr 04 00:00:00 EDT 2015}
}
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