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Injection Molding and Appearance of Cellulose-Reinforced Composites
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Materials and Production, IVF, Tillverkningsprocesser. Chalmers University of Technology, Sweden.ORCID iD: 0000-0003-3656-1806
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
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2019 (English)In: Polymer Engineering and Science, ISSN 0032-3888, E-ISSN 1548-2634, Vol. 60, no 1, p. 5-12Article in journal (Refereed) Published
Abstract [en]

Composite materials based on an ethylene-acrylic acid (EAA) copolymer and 20 wt% cellulose fibers were compounded by two runs in a twin-screw extruder. The composite material with cellulose fibers (CF) and a reference of unfilled EAA were injection molded into plaques using three different temperature profiles with end zone temperatures of 170°C, 200°C, and 230°C. The injection molded samples were then characterized in terms of their mechanical properties, thermal properties, appearance (color and gloss), and surface topography. The higher processing temperatures resulted in a clear discoloration of the composites, but there was no deterioration in the mechanical performance. The addition of cellulose typically gave a tensile modulus three times higher than that of the unfilled EAA, but the strength and strain at rupture were reduced when fibers were added. The processing temperature had no significant influence on the mechanical properties of the composites. Gloss measurements revealed negligible differences between the samples molded at the different melt temperatures but the surface smoothness was somewhat higher when the melt temperature was increased. In general, addition of the cellulose to the EAA reduced the gloss level and the surface smoothness.

Place, publisher, year, edition, pages
John Wiley and Sons Inc. , 2019. Vol. 60, no 1, p. 5-12
Keywords [en]
Cellulose, Deterioration, Ethylene, Glass ceramics, Mechanical properties, Natural fibers, Plastic products, Processing, Temperature, Textile fibers, Topography, Mechanical performance, Melt temperature, Processing temperature, Reinforced composites, Surface smoothness, Temperature profiles, Twin screw extruders, Zone temperature, Injection molding
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-40627DOI: 10.1002/pen.25253Scopus ID: 2-s2.0-85074096299OAI: oai:DiVA.org:ri-40627DiVA, id: diva2:1369257
Note

Funding text 1: The authors thank the Swedish Research Council Formas and Chalmers University of Technology for financial support. J. A. Bristow is gratefully acknowledged for the linguistic revision of the manuscript. Volvo is thanked for the possibilities to measure color and gloss.

Available from: 2019-11-11 Created: 2019-11-11 Last updated: 2020-01-10Bibliographically approved

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