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Production of sulfonated polyetheretherketone/polypropylene fibers for photoactive textiles

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Article number42595
JournalJournal of Applied Polymer Science
Issue number39
Publication statusPublished - 1 Oct 2015
Publication typeA1 Journal article-refereed


New photocatalytic fibers made of sulfonated polyetheretherketone (SPEEK)/polypropylene (PP) are melt compounded and melt spun, first on laboratory scale and then on a semi-industrial scale. Fiber spinnability is optimized and the fibers are characterized using mechanical testing, electron paramagnetic resonance (EPR) spectroscopy, and scanning electron microscopy (SEM). According to the results, the fiber spinnability remains at a good level up to 10 wt % SPEEK concentration. Optimal processing temperature is 200C due to the thermal degradation at higher temperatures. EPR measurements show good and long-lasting photoactivity after the initial irradiation but also decay in the radical intensity during several irradiation cycles. Mechanical tenacity of the SPEEK/PP 5:95 fiber is approximately 20% lower than for otherwise similar PP fiber. The fiber is a potential alternative to compete against TiO2-based products but more research needs to be done to verify the real-life performance.


  • blends, fibers, functionalization of polymers, photochemistry, textiles

Publication forum classification

Field of science, Statistics Finland