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Modification of silicone sealant to improve gamma radiation resistance, by addition of protective agents.

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Title: Modification of silicone sealant to improve gamma radiation resistance, by addition of protective agents.
Authors: González-Pérez, Giovanni1, Burillo, Guillermina1 burillo@nucleares.unam.mx
Source: Radiation Physics & Chemistry. Sep2013, Vol. 90, p98-103. 6p.
Subjects: Silicones, Sealing compounds, Barrier creams, Polydimethylsiloxane, Gamma rays, Naphthalene
Abstract: Abstract: Poly (dimethylsiloxane) (PDMS) sealant (SS) was modified with the addition of different protective compounds to conserve its physical-chemical properties during gamma irradiation. 2-Vinyl naphthalene (2-VN), bisphenol-A (BPA) and poly (vinyl carbazole) (PVK) were used to evaluate radiation protection through the crosslinking effect of radiation. The samples were irradiated with doses from 100kGy to 500kGy at room temperature in air, with a 60Co gamma source, and the changes in molecular weight, thermal behavior, elastic properties and infrared spectra (FTIR-ATR) absorbance analysis were determined. The molecular weight of unmodified silicone sealant increases with the absorbed dose because of crosslinking as predominant effect. However, the crosslinking effect was inhibited with the addition of protective agent due to the aromatic compounds present. Modified silicone sealant films present better radiation resistance than unmodified system. [Copyright &y& Elsevier]
Copyright of Radiation Physics & Chemistry is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 89295153
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Modification of silicone sealant to improve gamma radiation resistance, by addition of protective agents.
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  Data: <searchLink fieldCode="AR" term="%22González-Pérez%2C+Giovanni%22">González-Pérez, Giovanni</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burillo%2C+Guillermina%22">Burillo, Guillermina</searchLink><relatesTo>1</relatesTo><i> burillo@nucleares.unam.mx</i>
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  Data: <searchLink fieldCode="JN" term="%22Radiation+Physics+%26+Chemistry%22">Radiation Physics & Chemistry</searchLink>. Sep2013, Vol. 90, p98-103. 6p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Silicones%22">Silicones</searchLink><br /><searchLink fieldCode="DE" term="%22Sealing+compounds%22">Sealing compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Barrier+creams%22">Barrier creams</searchLink><br /><searchLink fieldCode="DE" term="%22Polydimethylsiloxane%22">Polydimethylsiloxane</searchLink><br /><searchLink fieldCode="DE" term="%22Gamma+rays%22">Gamma rays</searchLink><br /><searchLink fieldCode="DE" term="%22Naphthalene%22">Naphthalene</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Abstract: Poly (dimethylsiloxane) (PDMS) sealant (SS) was modified with the addition of different protective compounds to conserve its physical-chemical properties during gamma irradiation. 2-Vinyl naphthalene (2-VN), bisphenol-A (BPA) and poly (vinyl carbazole) (PVK) were used to evaluate radiation protection through the crosslinking effect of radiation. The samples were irradiated with doses from 100kGy to 500kGy at room temperature in air, with a 60Co gamma source, and the changes in molecular weight, thermal behavior, elastic properties and infrared spectra (FTIR-ATR) absorbance analysis were determined. The molecular weight of unmodified silicone sealant increases with the absorbed dose because of crosslinking as predominant effect. However, the crosslinking effect was inhibited with the addition of protective agent due to the aromatic compounds present. Modified silicone sealant films present better radiation resistance than unmodified system. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Radiation Physics & Chemistry is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.radphyschem.2013.03.014
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 98
    Subjects:
      – SubjectFull: Silicones
        Type: general
      – SubjectFull: Sealing compounds
        Type: general
      – SubjectFull: Barrier creams
        Type: general
      – SubjectFull: Polydimethylsiloxane
        Type: general
      – SubjectFull: Gamma rays
        Type: general
      – SubjectFull: Naphthalene
        Type: general
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      – TitleFull: Modification of silicone sealant to improve gamma radiation resistance, by addition of protective agents.
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            – D: 01
              M: 09
              Text: Sep2013
              Type: published
              Y: 2013
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              Value: 90
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