Abiotic thermo-oxidative degradation of high density polyethylene: Effect of manganese stearate concentration

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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.accessioned2019-08-20T00:17:32Z
dc.date.available2019-08-20T00:17:32Z
dc.date.issued2017
dc.description.abstract© 2017 Elsevier LtdThe effect of pro-degradant manganese (Mn) stearate concentration on the oxidative abiotic degradation of high-density polyethylene (HDPE) was investigated in thermo-oxidative tests at three temperatures (60, 70 and 80 °C) over time. Degradation monitoring was carried out, by determining carbonyl indices (CI), using infrared spectroscopy (IR), and by assessing molar masses and their distributions, using size exclusion chromatography (SEC) and tensile tests to assess mechanical properties. Deconvolution analyses of the absorbance bands obtained in the carbonyl region were performed to quantify the functional groups originated from degradation. Similar levels of degradation (equivalent molar mass and oxidation values) were obtained regardless of the investigated manganese concentration (50, 200 and 400 ppm). However, the results indicate that increasing Mn concentration may reduce the induction time for carbonyl formation. Deconvolution of the carbonyl region in IR spectra (between 1800 and 1650 cm−1) indicates that the addition of Mn results in increase in the concentration of oxidized functional groups (ketones, carboxylic acids, lactones, etc.) and that relationship between these groups varies depending on whether manganese stearate is present or not.
dc.description.firstpage95
dc.description.lastpage103
dc.description.volume143
dc.identifier.citationANTUNES, MARCELA C.; AGNELLI, JOS? A.M.; BABETTO, ALEX S.; Bonse, Baltus C.; BETTINI, S?LVIA H.P.. Abiotic thermo-oxidative degradation of high density polyethylene: Effect of manganese stearate concentration. POLYMER DEGRADATION AND STABILITY, v. 143, p. 95-103, 2017.
dc.identifier.doi10.1016/j.polymdegradstab.2017.06.012
dc.identifier.issn0141-3910
dc.identifier.urihttps://repositorio.fei.edu.br/handle/FEI/2214
dc.relation.ispartofPolymer Degradation and Stability
dc.rightsAcesso Restrito
dc.subject.otherlanguageManganese stearate
dc.subject.otherlanguagePolyethylene
dc.subject.otherlanguagePro-degradant
dc.subject.otherlanguageThermo-oxidative abiotic degradation
dc.titleAbiotic thermo-oxidative degradation of high density polyethylene: Effect of manganese stearate concentration
dc.typeArtigo
fei.scopus.citations23
fei.scopus.eid2-s2.0-85021425655
fei.scopus.subjectAbiotic degradation
fei.scopus.subjectCarbonyl formation
fei.scopus.subjectDeconvolution analysis
fei.scopus.subjectHigh density polyethylene(HDPE)
fei.scopus.subjectManganese concentration
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=85021425655&origin=inward
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