The effects of gamma irradiation on RTV polysiloxane foams

Labouriau, Andrea; Cady, Carl; Gill, John; Taylor, Dean; Zocco, Adam; Stull, Jamie; Henderson, Kevin; Wrobleski, Debra

doi:10.1016/j.polymdegradstab.2015.03.021

Title: The effects of gamma irradiation on RTV polysiloxane foams

Journal Article · Sat Apr 04 00:00:00 EDT 2015 · Polymer Degradation and Stability

DOI:https://doi.org/10.1016/j.polymdegradstab.2015.03.021· OSTI ID:1467363

Labouriau, Andrea ^[1]; Cady, Carl ^[1]; Gill, John ^[1]; Taylor, Dean ^[1]; Zocco, Adam ^[1]; Stull, Jamie ^[1]; Henderson, Kevin ^[1]; Wrobleski, Debra ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1467363

Alternate ID(s):: OSTI ID: 1245238

Report Number(s):: LA-UR-14-28787

Journal Information:: Polymer Degradation and Stability, Vol. 117; ISSN 0141-3910

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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Development of mechanically durable hydrophobic lanolin/silicone rubber coating on viscose fibers Khattab, Tawfik A.; Mowafi, Salwa; El-Sayed, Hosam Cellulose, Vol. 26, Issue 17 https://doi.org/10.1007/s10570-019-02721-5	journal	September 2019
Synergistic effect of β-Bi2O3 and graphene/MWCNT in silicone-based polymeric matrices on diagnostic X-ray attenuation Jayakumar, Sangeetha; Saravanan, T.; Vadivel, M. Applied Nanoscience, Vol. 9, Issue 8 https://doi.org/10.1007/s13204-019-00972-z	journal	February 2019

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36 MATERIALS SCIENCE
polysiloxanes
gamma irradiation
RTV
foams

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