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Electron beam irradiation of fluoropolymers containing polyethers

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Title: Electron beam irradiation of fluoropolymers containing polyethers
Authors: Bucio, E.1, Burillo, G.1 burillo@nucleares.unam.mx, Tapia, F.1, Adem, E.2, Cedillo, G.3, Cassidy, P.E.4
Source: Radiation Physics & Chemistry. Feb2009, Vol. 78 Issue 2, p119-123. 5p.
Subjects: Electron beams, Irradiation, Fluoropolymers, Polyethers, Radiochemistry, Polycondensation
Abstract: Abstract: A highly fluorinated monomer, 1,3-bis(1,1,1,3,3,3-hexafluoro-2-pentafluorophenyl methoxy-2-propyl)benzene (12F-FBE) was polymerized with some diphenols by polycondensation and then was electron beam irradiated between 100 and 1000kGy to determine degradation radiochemistry yield (G s) by gel permeation chromatography (GPC). The samples were characterized after irradiation by DSC, FTIR, and nuclear magnetic resonance (NMR). The fluoropolymers show apparent degradation in mechanical properties at 300kGy, except 12F-FBE polymerized with biphenol and bisphenol A, when they did not show any apparent physical change up to 300kGy; and continue to be flexible and transparent, with a radiochemical yield scission (G s) of 0.75, 0.53, 0.88, and 0.38 for 12F-FBE/SDL aliphatic, 12F-FBE/biphenol, 12F-FBE/bisphenol A, and 12F-FBE/bisphenol O, respectively. The number average molecular weights for three of the polymers decrease upon 1000kGy irradiation to 10% of their original values; however, the polymer from bisphenol A is much more stable and its M n decreases to only 24% of original. [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: 35502941
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Electron beam irradiation of fluoropolymers containing polyethers
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  Data: <searchLink fieldCode="AR" term="%22Bucio%2C+E%2E%22">Bucio, E.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burillo%2C+G%2E%22">Burillo, G.</searchLink><relatesTo>1</relatesTo><i> burillo@nucleares.unam.mx</i><br /><searchLink fieldCode="AR" term="%22Tapia%2C+F%2E%22">Tapia, F.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Adem%2C+E%2E%22">Adem, E.</searchLink><relatesTo>2</relatesTo><br /><searchLink fieldCode="AR" term="%22Cedillo%2C+G%2E%22">Cedillo, G.</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Cassidy%2C+P%2EE%2E%22">Cassidy, P.E.</searchLink><relatesTo>4</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Radiation+Physics+%26+Chemistry%22">Radiation Physics & Chemistry</searchLink>. Feb2009, Vol. 78 Issue 2, p119-123. 5p.
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  Data: <searchLink fieldCode="DE" term="%22Electron+beams%22">Electron beams</searchLink><br /><searchLink fieldCode="DE" term="%22Irradiation%22">Irradiation</searchLink><br /><searchLink fieldCode="DE" term="%22Fluoropolymers%22">Fluoropolymers</searchLink><br /><searchLink fieldCode="DE" term="%22Polyethers%22">Polyethers</searchLink><br /><searchLink fieldCode="DE" term="%22Radiochemistry%22">Radiochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Polycondensation%22">Polycondensation</searchLink>
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  Label: Abstract
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  Data: Abstract: A highly fluorinated monomer, 1,3-bis(1,1,1,3,3,3-hexafluoro-2-pentafluorophenyl methoxy-2-propyl)benzene (12F-FBE) was polymerized with some diphenols by polycondensation and then was electron beam irradiated between 100 and 1000kGy to determine degradation radiochemistry yield (G s) by gel permeation chromatography (GPC). The samples were characterized after irradiation by DSC, FTIR, and nuclear magnetic resonance (NMR). The fluoropolymers show apparent degradation in mechanical properties at 300kGy, except 12F-FBE polymerized with biphenol and bisphenol A, when they did not show any apparent physical change up to 300kGy; and continue to be flexible and transparent, with a radiochemical yield scission (G s) of 0.75, 0.53, 0.88, and 0.38 for 12F-FBE/SDL aliphatic, 12F-FBE/biphenol, 12F-FBE/bisphenol A, and 12F-FBE/bisphenol O, respectively. The number average molecular weights for three of the polymers decrease upon 1000kGy irradiation to 10% of their original values; however, the polymer from bisphenol A is much more stable and its M n decreases to only 24% of original. [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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        Value: 10.1016/j.radphyschem.2008.08.004
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      – Code: eng
        Text: English
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        PageCount: 5
        StartPage: 119
    Subjects:
      – SubjectFull: Electron beams
        Type: general
      – SubjectFull: Irradiation
        Type: general
      – SubjectFull: Fluoropolymers
        Type: general
      – SubjectFull: Polyethers
        Type: general
      – SubjectFull: Radiochemistry
        Type: general
      – SubjectFull: Polycondensation
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      – TitleFull: Electron beam irradiation of fluoropolymers containing polyethers
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              Text: Feb2009
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              Y: 2009
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