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Recycling Oxidized Model Polyethylene Powder as a Degradation Enhancing Filler for Polyethylene/Polycaprolactone Blends
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymer Technology.ORCID iD: 0000-0002-7790-8987
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymer Technology.
2016 (English)In: ACS Sustainable Chemistry and Engineering, ISSN 2168-0485, Vol. 4, no 1, 129-135 p.Article in journal (Refereed) PublishedText
Abstract [en]

Polyethylene (PE) powder with different degrees of oxidation was prepared to model end-of life polyethylene that has been oxidized during processing and/or service-life. The nonoxidized and preoxidized PE powders were blended with PCL to evaluate the possibility to recycle PE powder in PCL blends. Good elongation at break was reached for all 25/75 (w/w) PE/PCL films and the elongation at break correlated well with the carbonyl index of the original PE powder, indicating that the oxidation of PE increased the interfacial adhesion with PCL and improved the blend properties. The preoxidized PE powder in combination with surfactant and pro-oxidant greatly accelerated the degradation rate of PCL as measured by molecular weight decrease during low temperature thermo-oxidative aging. This coincided with the fast initial increase in PE carbonyl index. The degradation accelerating effect was larger when preoxidized PE was blended with PCL as compared to when nonoxidized PE was added. However, the degree of preoxidation had minor impact on PCL degradation rate. Without PE powder the degradation rate of PCL was not enhanced by the addition of pro-oxidant and surfactant alone.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2016. Vol. 4, no 1, 129-135 p.
Keyword [en]
ENVIRONMENTAL DEGRADATION, MICROBIAL-DEGRADATION, FILMS, BIODEGRADATION, PLASTICS, POLYCAPROLACTONE, POLYOLEFINS, CULTIVATION, PRODUCTS, SURFACE
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-181443DOI: 10.1021/acssuschemeng.5b00858ISI: 000367706700014ScopusID: 2-s2.0-84953282791OAI: oai:DiVA.org:kth-181443DiVA: diva2:900360
Note

QC 20160204. QC 20160205

Available from: 2016-02-04 Created: 2016-02-02 Last updated: 2016-02-05Bibliographically approved

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Michalak, M.Hakkarainen, MinnaAlbertsson, Ann-Christine
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