Przeglądaj wg Autor "Kowalski-Stankiewicz, Janusz P."

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  • Miniatura
    PozycjaOpen Access
    E-Beam Effects on Poly(Xylitol Dicarboxylate-co-diol Dicarboxylate) Elastomers Tailored by Adjusting Monomer Chain Length
    (MDPI, 2021-04-02) Piątek-Hnat, Marta; Bomba, Kuba; Kowalski-Stankiewicz, Janusz P.; Pęksiński, Jakub; Kozłowska, Agnieszka; Sośnicki, Jacek G.; Idzik, Tomasz J.; Schmidt, Beata; Kowalczyk, Krzysztof; Walo, Marta; Mikołajczak, Grzegorz; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; Pomeranian Medical University in Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; Institute of Nuclear Chemistry and Technology,Warszawa; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin
    Poly(xylitol dicarboxylate-co-diol dicarboxylate) elastomers can by synthesized using wide variety of monomers with different chain lengths. Obtained materials are all biodegradable, thermally stable elastomers, but their specific properties like glass transition temperature, degradation susceptibility, and mechanical moduli can be tailored for a specific application. Therefore, we synthesized eight elastomers using a combination of two dicarboxylic acids, namely suberic and sebacic acid, and four different diols, namely ethanediol, 1,3-propanediol, 1,4-buanediol, and 1,5- pentanediol. Materials were further modified by e-beam treatment with a dose of 100 kGy. Materials both before and after radiation modification were tested using tensile tests, gel fraction determination, 1H NMR, and 13C NMR. Thermal properties were tested by Differential Scanning Calorimetry (DSC), Dynamic Thermomechanical Analysis (DMTA) and Thermogravimetric Analysis (TGA). Degradation susceptibility to both enzymatic and hydrolytic degradation was also determined.
  • Miniatura
    PozycjaOpen Access
    Physical Effects of Radiation Modification of Biodegradable Xylitol-Based Materials Synthesized Using a Combination of Different Monomers
    (MDPI, 2021-03-26) Piątek-Hnat, Marta; Bomba, Kuba; Kowalski-Stankiewicz, Janusz P.; Pęksiński, Jakub; Kozłowska, Agnieszka; Sośnicki, Jacek G.; Idzik, Tomasz J.; Schmidt, Beata; Kowalczyk, Krzysztof; Walo, Marta; Kochmańska, Agnieszka; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; Pomeranian Medical University in Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; Institute of Nuclear Chemistry and Technology,Warszawa; West Pomeranian University of Technology, Szczecin
    There is a possibility of obtaining xylitol-based elastomers sharing common characteristics of biodegradability, thermal stability, and elastomeric behavior by using monomers with different chain-lengths. Therefore, we have synthesized eight elastomers using a combination of four different diols (ethanediol, 1.3-propanediol, 1.4-buanediol, and 1.5-pentanediol) and two different dicarboxylic acids (succinic acid and adipic acid). The obtained materials were further modified by performing e-beam treatment with a dose of 100 kGy. Materials both before and after radiation modification were tested by DSC, DMTA, TGA, tensile tests, gel fraction determination, hydrolytic and enzymatic degradation tests, 1H NMR and 13C NMR and FTIR.