Correlating different techniques in the thermooxidative degradation monitoring of high-density polyethylene containing pro-degradant and antioxidants

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dc.contributor.authorAntunes M.C.
dc.contributor.authorAgnelli J.A.M.
dc.contributor.authorBabetto A.S.
dc.contributor.authorBonse B.C.
dc.contributor.authorBettini S.H.P.
dc.date.accessioned2019-08-20T00:17:33Z
dc.date.available2019-08-20T00:17:33Z
dc.date.issued2018
dc.description.abstract© 2018 Elsevier LtdDifferent techniques were used to assess the effect of a primary and a secondary antioxidant, separately, and in combination with a pro-degradant (manganese stearate) on the thermooxidative abiotic degradation of high-density polyethylene (HDPE). The parameters measured over time at three temperatures (60, 70 and 80 °C) were variation in carbonyl index (CI), by means of infrared spectroscopy; reduction in tensile strain at break, by means of mechanical testing; reduction in molar mass distribution by means of size exclusion chromatography (SEC). Regardless of the presence of primary or secondary antioxidants, the same levels of degradation were attained. However, contrary to the secondary antioxidant, the primary antioxidant significantly increased induction time of HDPE oxidative degradation processes, evidenced by the shift in the “CI versus time” curve and by the considerably longer time for the strain at break to reach minimal values. Increase in thermooxidation temperature reduced induction time significantly.
dc.description.firstpage182
dc.description.lastpage187
dc.description.volume69
dc.identifier.citationMarcela C. Antunes; José A.M. Agnelli; Alex S. Babetto; Baltus Cornelius Bonse; Sílvia H.P. Bettini. Correlating different techniques in the thermooxidative degradation monitoring of high-density polyethylene containing pro-degradant and antioxidants. POLYMER TESTING, v. 69, p. 182-187, 2018.
dc.identifier.doi10.1016/j.polymertesting.2018.05.008
dc.identifier.issn0142-9418
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/2224
dc.relation.ispartofPolymer Testing
dc.rightsAcesso Restrito
dc.subject.otherlanguageAntioxidant
dc.subject.otherlanguagePolyethylene
dc.subject.otherlanguagePro-degradant
dc.subject.otherlanguageThermooxidative abiotic degradation
dc.titleCorrelating different techniques in the thermooxidative degradation monitoring of high-density polyethylene containing pro-degradant and antioxidants
dc.typeArtigo
fei.scopus.citations16
fei.scopus.eid2-s2.0-85047316939
fei.scopus.subjectAbiotic degradation
fei.scopus.subjectHigh density polyethylene(HDPE)
fei.scopus.subjectMolar mass distribution
fei.scopus.subjectOxidative degradation
fei.scopus.subjectPrimary antioxidants
fei.scopus.subjectPro-degradant
fei.scopus.subjectThermo-oxidative degradation
fei.scopus.subjectThree temperature
fei.scopus.updated2024-03-04
fei.scopus.urlhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85047316939&origin=inward
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