View in EDS

Influence of the viscoelastic regime onto the UV reactivity of poly(lactic acid).

Saved in:
Bibliographic Details
Title: Influence of the viscoelastic regime onto the UV reactivity of poly(lactic acid).
Authors: Marek, Adam A.1 adam.a.marek@polsl.pl, Verney, Vincent1
Source: European Polymer Journal. Jan2019, Vol. 110, p138-144. 7p.
Subjects: Viscoelasticity, Reactivity (Chemistry), Polylactic acid, Photochemistry, Hydroperoxides
Abstract: Graphical abstract Highlights • The photochemical reactivity of PLA in the rubbery and molten state is exemplified. • PhotoRheology and photoDSC are used to determine the reactivity of PLA. • The photochemical reactivity of PLA depends on viscoelastic state. • The influence of hydroperoxides on the evolution on T g for PLA is discussed. Abstract The photochemical reactivity of poly(lactic acid) in the rubbery and molten state was determined by two methods: photoRheology and photoDSC. Significant changes in rheological behaviour of PLA were observed, depending on the viscoelastic regime. In the rubbery state, cold crystallization causes difficulties in oxygen diffusion resulting mainly in crosslinking reactions. In the molten state, the competition between crosslinking and degradation was observed due to hydroperoxides decomposition. In all cases UV irradiation intensifies the reactions. Using PhotoDSC we determined the effect of hydroperoxides on the PLA degradation process, and the difference in effectiveness of temperature and UV on hydroperoxides decomposition. [ABSTRACT FROM AUTHOR]
Copyright of European Polymer Journal is the property of Elsevier B.V. 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
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 133622807
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Influence of the viscoelastic regime onto the UV reactivity of poly(lactic acid).
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Marek%2C+Adam+A%2E%22">Marek, Adam A.</searchLink><relatesTo>1</relatesTo><i> adam.a.marek@polsl.pl</i><br /><searchLink fieldCode="AR" term="%22Verney%2C+Vincent%22">Verney, Vincent</searchLink><relatesTo>1</relatesTo>
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22European+Polymer+Journal%22">European Polymer Journal</searchLink>. Jan2019, Vol. 110, p138-144. 7p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Viscoelasticity%22">Viscoelasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Reactivity+%28Chemistry%29%22">Reactivity (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Polylactic+acid%22">Polylactic acid</searchLink><br /><searchLink fieldCode="DE" term="%22Photochemistry%22">Photochemistry</searchLink><br /><searchLink fieldCode="DE" term="%22Hydroperoxides%22">Hydroperoxides</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Graphical abstract Highlights • The photochemical reactivity of PLA in the rubbery and molten state is exemplified. • PhotoRheology and photoDSC are used to determine the reactivity of PLA. • The photochemical reactivity of PLA depends on viscoelastic state. • The influence of hydroperoxides on the evolution on T g for PLA is discussed. Abstract The photochemical reactivity of poly(lactic acid) in the rubbery and molten state was determined by two methods: photoRheology and photoDSC. Significant changes in rheological behaviour of PLA were observed, depending on the viscoelastic regime. In the rubbery state, cold crystallization causes difficulties in oxygen diffusion resulting mainly in crosslinking reactions. In the molten state, the competition between crosslinking and degradation was observed due to hydroperoxides decomposition. In all cases UV irradiation intensifies the reactions. Using PhotoDSC we determined the effect of hydroperoxides on the PLA degradation process, and the difference in effectiveness of temperature and UV on hydroperoxides decomposition. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Polymer Journal is the property of Elsevier B.V. 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=133622807
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.eurpolymj.2018.11.016
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 7
        StartPage: 138
    Subjects:
      – SubjectFull: Viscoelasticity
        Type: general
      – SubjectFull: Reactivity (Chemistry)
        Type: general
      – SubjectFull: Polylactic acid
        Type: general
      – SubjectFull: Photochemistry
        Type: general
      – SubjectFull: Hydroperoxides
        Type: general
    Titles:
      – TitleFull: Influence of the viscoelastic regime onto the UV reactivity of poly(lactic acid).
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Marek, Adam A.
      – PersonEntity:
          Name:
            NameFull: Verney, Vincent
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 01
              M: 01
              Text: Jan2019
              Type: published
              Y: 2019
          Identifiers:
            – Type: issn-print
              Value: 00143057
          Numbering:
            – Type: volume
              Value: 110
          Titles:
            – TitleFull: European Polymer Journal
              Type: main
ResultId 1