1. Institute of Materials Technology, Polymer Processing Division; Poznan University of Technology, 60-965 Poznan, Poland
2. Department of Machines Construction and Materials, Maritime University of Szczecin, 71-650 Szczecin, Poland
3. Department of Interdisciplinary Dentistry, Pomeranian Medical University, 70-111 Szczecin, Poland
4. Institute of Material Science and Engineering, West Pomeranian University of Szczecin, 70-310 Szczecin, Poland