Constitutive modeling of Radiation effects on the Permanent Set in a silicone elastomer

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When a networked polymeric composite under high stress is subjected to irradiation, the resulting chemical changes like chain scissioning and cross-link formation can lead to permanent set and altered elastic modulus. Using a commercial silicone elastomer as a specific example we show that a simple 2-stage Tobolsky model in conjunction with Fricker's stress-transfer function can quantitatively reproduce all experimental data as a function of radiation dosage and the static strain at which radiation is turned on, including permanent set, stress-strain response, and net cross-linking density.

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Maiti, A; Gee, R; Weisgraber, T; Chinn, S & Maxwell, R March 10, 2008.

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When a networked polymeric composite under high stress is subjected to irradiation, the resulting chemical changes like chain scissioning and cross-link formation can lead to permanent set and altered elastic modulus. Using a commercial silicone elastomer as a specific example we show that a simple 2-stage Tobolsky model in conjunction with Fricker's stress-transfer function can quantitatively reproduce all experimental data as a function of radiation dosage and the static strain at which radiation is turned on, including permanent set, stress-strain response, and net cross-linking density.

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PDF-file: 16 pages; size: 0.6 Mbytes

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  • Journal Name: Polymer Degradation and Stability, vol. 93, no. 12, December 1, 2008, pp. 2226-2229; Journal Volume: 93; Journal Issue: 12

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  • Report No.: LLNL-JRNL-402192
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 945133
  • Archival Resource Key: ark:/67531/metadc893775

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  • March 10, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 23, 2016, 11:29 a.m.

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Maiti, A; Gee, R; Weisgraber, T; Chinn, S & Maxwell, R. Constitutive modeling of Radiation effects on the Permanent Set in a silicone elastomer, article, March 10, 2008; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc893775/: accessed July 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.