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Materials (Basel)

Title:		POM/EVA Blends with Future Utility in Fused Deposition Modeling
Author(s):		Galeja M; Wypior K; Wachowicz J; Kedzierski P; Hejna A; Marc M; Klewicz K; Gabor J; Okla H; Swinarew AS;
Address:		"Department of Material Engineering, Central Mining Institute, Pl. Gwarkow 1, 40-166 Katowice, Poland. Department of Acoustics, Electronics and IT Solutions, Central Mining Institute, Pl. Gwarkow 1, 40-166 Katowice, Poland. Department of Polymer Technology, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland. Department of Analytical Chemistry, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland. Faculty of Science and Technology, University of Silesia in Katowice, 41-500 Chorzow, Poland. Institute of Sport Science, The Jerzy Kukuczka Academy of Physical Education, 40-065 Katowice, Poland"
Journal Title:		Materials (Basel)
Year:		2020
Volume:		20200629
Issue:		13
Page Number:		-
DOI:		10.3390/ma13132912
ISSN/ISBN:		1996-1944 (Print) 1996-1944 (Electronic) 1996-1944 (Linking)
Abstract:		"Polyoxymethylene (POM) is one of the most popular thermoplastic polymers used in the industry. Therefore, the interest in its potential applications in rapid prototyping is understandable. Nevertheless, its low dimensional stability causes the warping of 3D prints, limiting its applications. This research aimed to evaluate the effects of POM modification with ethylene-vinyl acetate (EVA) (2.5, 5.0, and 7.5 wt.%) on its processing (by melt flow index), structure (by X-ray microcomputed tomography), and properties (by static tensile tests, surface resistance, contact angle measurements, differential scanning calorimetry, and thermogravimetric analysis), as well as very rarely analyzed emissions of volatile organic compounds (VOCs) (by headspace analysis). Performed modifications decreased stiffness and strength of the material, simultaneously enhancing its ductility, which simultaneously increased the toughness even by more than 50% for 7.5 wt.% EVA loading. Such an effect was related to an improved linear flow rate resulting in a lack of defects inside the samples. The decrease of the melting temperature and the slight increase of thermal stability after the addition of EVA broadened the processing window for 3D printing. The 3D printing trials on two different printers showed that the addition of EVA copolymer increased the possibility of a successful print without defects, giving space for further development"
Keywords:		3D printing ethylene-vinyl acetate polymer blends polyoxymethylene volatile organic compounds warping;
Notes:		"PubMed-not-MEDLINEGaleja, Mateusz Wypior, Klaudiusz Wachowicz, Jan Kedzierski, Przemyslaw Hejna, Aleksander Marc, Mariusz Klewicz, Krzysztof Gabor, Jadwiga Okla, Hubert Swinarew, Andrzej Szymon eng Switzerland 2020/07/03 Materials (Basel). 2020 Jun 29; 13(13):2912. doi: 10.3390/ma13132912"