Long-term creep compliance of wood polymer composites : using untreated wood fibers as a filler in recycled and neat polypropylene matrix

Bek, Marko (author), Aulova, Alexandra (author), Pušnik Črešnar, Klementina (author), Matkovič, Sebastjan (author), Kalin, Mitjan (author), Slemenik Perše, Lidija (author)

Neat (NPP) and recycled (RPP) polypropylene matrix materials were used to prepare wood–polymer composites with untreated wood fibers up to 40 wt.%. Long-term creep properties obtained through the time-temperature superposition showed superior creep resistance of composites with NPP matrix. In part, this is attributed to their higher crystallinity and better interfacial adhesion caused by the formation of a transcrystalline layer. This difference resulted in up to 25% creep compliance reduction of composites with NPP matrix compared to composites with recycled (RPP) polypropylene matrix, which does not form a transcrystalline layer between the fibers and polymer matrix. Despite the overall inferior creep performance of composites with RPP matrix, from the 20 wt.% on, the creep compliance is comparable and even surpasses the creep performance of unfilled NPP matrix and can be a promising way to promote sustainability.

• Language: English
• Keywords: wood–polymer composites, creep, durability, wood, recycling
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: 19 str.
• Numbering: Vol. 14, iss. 13, art. 2539
• PID: 20.500.12556/RUL-137942
• UDC: 677.017:631.571
• ISSN on article: 2073-4360
• DOI: 10.3390/polym14132539
• COBISS.SI-ID: 113069315
• Publication date in RUL: 06.07.2022

Record is a part of a journal

• Title: Polymers
• Shortened title: Polymers
• Publisher: MDPI
• ISSN: 2073-4360
• COBISS.SI-ID: 517951257

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: lesno-polimerni kompoziti, lezenje, vzdržljivost, les, recikliranje