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Photochemical reactivity of PLA at the vicinity of glass transition temperature. The photo-rheology method.

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Title: Photochemical reactivity of PLA at the vicinity of glass transition temperature. The photo-rheology method.
Authors: Marek, Adam A.1,2 adam.a.marek@polsl.pl, Verney, Vincent1,3 vincent.verney@univ-bpclermont.fr
Source: European Polymer Journal. Aug2016, Vol. 81, p239-246. 8p.
Abstract: A photo-rheology method was applied to determine photochemical reactivity of poly(lactic acid) close to glass transition region. The differences in the rheological behaviour were measured during in situ UV irradiation in air. At low frequency (1 rad s −1 ), the highest reactivity was observed at the glass transition temperature which corresponds to the data from DSC. Below and above this temperature, the rate of PLA chain scission degradation was lower. Moreover, it was also shown that changing the oscillation frequency led to the maximal rate of the chain scission rate occurring at temperatures slightly higher (shifted due to time-temperature superposition effects). [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.)
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  Data: Photochemical reactivity of PLA at the vicinity of glass transition temperature. The photo-rheology method.
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  Data: <searchLink fieldCode="AR" term="%22Marek%2C+Adam+A%2E%22">Marek, Adam A.</searchLink><relatesTo>1,2</relatesTo><i> adam.a.marek@polsl.pl</i><br /><searchLink fieldCode="AR" term="%22Verney%2C+Vincent%22">Verney, Vincent</searchLink><relatesTo>1,3</relatesTo><i> vincent.verney@univ-bpclermont.fr</i>
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  Data: <searchLink fieldCode="JN" term="%22European+Polymer+Journal%22">European Polymer Journal</searchLink>. Aug2016, Vol. 81, p239-246. 8p.
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  Data: A photo-rheology method was applied to determine photochemical reactivity of poly(lactic acid) close to glass transition region. The differences in the rheological behaviour were measured during in situ UV irradiation in air. At low frequency (1 rad s −1 ), the highest reactivity was observed at the glass transition temperature which corresponds to the data from DSC. Below and above this temperature, the rate of PLA chain scission degradation was lower. Moreover, it was also shown that changing the oscillation frequency led to the maximal rate of the chain scission rate occurring at temperatures slightly higher (shifted due to time-temperature superposition effects). [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.)
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        Value: 10.1016/j.eurpolymj.2016.06.016
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              Text: Aug2016
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