Characterization of wood‐filled thermoplastic polyurethanes for the injection molding process. Issue 38 (8th May 2021)

• Record Type: Journal Article
• Authors: Moritzer, Elmar; Richters, Maximilian
• Is Part Of: Journal of applied polymer science. Volume 138:Issue 38(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-05-08
• Subjects: cellulose and other wood products -- composites -- polyurethane -- thermoplastics; Polymers -- Periodicals; Polymerization -- Periodicals; 668.9
• DOI: 10.1002/app.50968
• Languages: English
• ISSNs: 0021-8995

Abstract

Abstract: Fiber fillings of wood plastic composites (WPC) are almost exclusively limited to standard plastics such as polyethylene and polypropylene. At the Kunststofftechnik Paderborn of the University of Paderborn the wood fiber filling of engineering plastics is being promoted. WPC with different fiber types and fiber contents based on two thermoplastic polyurethanes (TPU) were compounded and subsequently characterized. We found that the physicochemical properties of the materials differ from standard plastic‐based WPC. Wood filling with increasing fiber content did not immediately correlate with an increase in density. A decrease in density and swelling of the compound was detected with reaching a critical fiber content. Our compounds showed an increased water absorption at high‐fiber contents over time, which can be described logarithmically. The observed viscosity curves obey the Ostwald and de Waele power law, but an increased viscosity at increased fiber content was not apparent for both TPU matrices. Abstract :