Przeglądaj wg Autor "Bomba, Kuba"

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    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
    Effect of E-Beam Irradiation on Thermal and Mechanical Properties of Ester Elastomers Containing Multifunctional Alcohols
    (MDPI, 2020-05-02) Piątek-Hnat, Marta; Bomba, Kuba; Pęksiński, Jakub; Kozłowska Agnieszka; Sośnicki, Jacek G.; Idzik, Tomasz J.; 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
    The aim of this work was to investigate the thermal and mechanical properties of novel, electron beam-modified ester elastomers containing multifunctional alcohols. Polymers tested in this work consist of two blocks: sebacic acid–butylene glycol block and sebacic acid–sugar alcohol block. Di erent sugar alcohols were utilized in the polymer synthesis: glycerol, sorbitol, xylitol, erythritol, and mannitol. The polymers have undergone an irradiation procedure. The materials were irradiated with doses of 50 kGy, 100 kGy, and 150 kGy. The expected e ect of using ionizing radiation was crosslinking process and improvement of the mechanical properties. Additionally, a beneficial side e ect of the irradiation process is sterilization of the a ected materials. It is also worth noting that the materials described in this paper do not require either sensitizers or cross-linking agent in order to perform radiation modification. Radiation-modified poly(polyol sebacate-co-butylene sebacate) elastomers have been characterized in respect to the mechanical properties (quasi-static tensile tests), cross-link density, thermal properties (Di erential Scanning Calorimetry (DSC)), chemical properties: Fourier transform infrared spectroscopy (FTIR), and wettability (water contact angle). Poly(polyol sebacate-co-butylene sebacate) preopolymers were characterized with nuclear magnetic resonance spectroscopy (1HNMRand 13C NMR) and gel permeation chromatography (GPC). Thermal stability of cross-linked materials (directly after synthesis process) was tested with thermogravimetric analysis (TGA).
  • Miniatura
    PozycjaOpen Access
    Influence of e-beam irradiation on the physicochemical properties of poly(polyol succinate-co-butylene succinate) ester elastomers
    (2020-07-17) Piątek-Hnat, Marta; Bomba, Kuba; Pęksiński, Jakub; Kozłowska, Agnieszka; Sośnicki, Jacek G.; Idzik, Tomasz J.; Piwowarska, Danuta; Janik, Jolanta; 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; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin
    The purpose of this research was synthesis and electron beam modification of novel ester elastomers consisting of sugar alcohol–succinic acid block and butylene glycol–succinic acid block. Four di erent alditols were used in the synthesis—sorbitol, erythritol, xylitol, and glycerol. The materials were irradiated with doses of 50, 100, and 150 kGy in order to determine which dose is the most beneficial. As expected, irradiation of the materials has led to the cross-link density becoming higher and improvement of the mechanical properties. Additionally, the materials were also sterilized in the process. The great advantage of elastomers described in the paper is the fact that they do not need chemical cross-linking agents or sensitizers in order to undergo radiation modification. The following tests were performed on cross-linked poly(polyol succinate-co-butylene succinate) elastomers: quasi-static tensile test, determination of cross-link density, di erential scanning calorimetry (DSC), dynamic thermomechanical analysis (DMTA), wettability (water contact angle), and Fourier transform infrared spectroscopy (FTIR). In order to confirm successful synthesis, prepolymers were analyzed by nuclear magnetic resonance spectroscopy (1H NMR and 13C NMR).
  • Miniatura
    PozycjaOpen Access
    The influence of of cross-linking process on the physicochemical properties of new copolyesters containing xylitol
    (Elsevier, 2020-03-01) Piątek-Hnat, Marta; Bomba, Kuba; West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Department of Polymer and Biomaterials Science; West Pomeranian University of Technology, Faculty of Chemical Technology and Engineering, Department of Polymer and Biomaterials Science
    The goal of this research was developing biodegradable and biocompatibile xylitol-based copolymers with im proved mechanical properties, and investigating the change in their thermal and chemical properties with progress of the cross-linking process. Using a raw material of natural origin such as xylitol, a prepolymer was obtained by esterification and polycondensation. Then, at subsequent stages of the crosslinking process in a vacuum dryer, samples of materials were taken to determine the progress of the process using Fourier transform infrared spectroscopy. The method of differential scanning calorimetry also defined changes in the ranges of phase changes occurring at each stage of the crosslinking process. After the crosslinking process, ester materials based on sebacic and succinic acid were characterized in terms of mechanical and surface properties.
  • 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.
  • Miniatura
    PozycjaOpen Access
    Structure and Properties of Biodegradable Poly (Xylitol Sebacate-Co-Butylene Sebacate) Copolyester
    (MDPI, 2020-03-28) Piątek-Hnat, Marta; Bomba, Kuba; Pęksiński, Jakub; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin; West Pomeranian University of Technology, Szczecin
    In this work, a bio-based copolyester with good mechanical properties was synthesized and characterized in terms of structure, main properties and biodegradability Determining the chemical structure of such materials is important to understand their behavior and properties. Performing an extraction of insoluble cross-linked polymer using di erent solvents allowed us to analyze how the polymer behaves when subjected to di erent chemical environments, and to obtain soluble samples suitable for more in-depth analysis. Chemical structure of poly (xylitol sebacate-co-butylene sebacate) was determined by a 1H NMR and FTIR analysis of both prepolymer gel sample and samples obtained by extraction of cross-linked polymer using di erent solvents. Block structure of the copolymer was confirmed by both NMR and DSC. Gel fraction, swelling value, water contact angle, and mechanical properties were also analyzed. Biodegradability of this material was confirmed by performing enzymatic and hydrolytic degradation. Synthesizing sugar-alcohol based copolyester using three monomers leads to obtaining a material with interesting chemical structure and desirable mechanical properties comparable to conventional elastomers.
  • Miniatura
    PozycjaOpen Access
    Synthesis and Selected Properties of Ester Elastomer Containing Sorbitol
    (MDPI, 2020-02-29) Piątek-Hnat, Marta; Bomba, Kuba; Pęksiński, Jakub; West Pomeranian University of Technology in Szczecin. Faculty of Chemical Technology and Engineering; West Pomeranian University of Technology in Szczecin. Faculty of Chemical Technology and Engineering; West Pomeranian University of Technology in Szczecin. Faculty of Electrical Engineering
    The aim of this work was synthesizing ester elastomers, using sorbitol as a monomer obtainable from renewable sources. Three polymers were synthesized, utilizing three di erent polycondensation times. Their mechanical and thermal properties were examined and compared. Poly(sorbitol sebacate-co-butylene sebacate) elastomers were synthesized as a result of polycondensation reaction, using sebacic acid, butylene glycol and sorbitol as monomers. Resulting materials had good mechanical properties and a cross-linked structure. Such elastomers are susceptible to hydrolytic degradation which has been confirmed in earlier studies. This paper shows that the material synthesized utilizing a 3.5 h polycondensation time has the most desirable mechanical and thermal properties, and the reaction is characterized by the highest degree of conversion of substrates.
  • Miniatura
    PozycjaOpen Access
    Tailoring the Physico-chemical Properties of Poly(xylitol-dicarboxylate-co-butylene dicarboxylate) Polyesters by Adjusting the Cross-Linking Time
    (MDPI, 2020-07-03) Piątek-Hnat, Marta; Sładkiewicz, Paulina; Bomba, Kuba; Pęksiński, Jakub; Kozłowska, Agnieszka; Sośnicki, Jacek G.; Idzik, Tomasz J.; 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; West Pomeranian University of Technology, Szczecin
    Determining the cross-linking time resulting in the best achievable properties in elastomers is a very important factor when considering their mass production. In this paper, five biodegradable polymers were synthesized—poly(xylitol-dicarboxylate-co-butylene dicarboxylate) polymers, based on xylitol obtained from renewable sources. Five di erent dicarboxylic acids with even numbers of carbon atoms in the aliphatic chain were used: succinic acid, adipic acid, suberic acid, sebacic acid, and dodecanedioic acid. Samples were taken directly after polycondensation (prepolymer samples) and at di erent stages of the cross-linking process. Physiochemical properties were determined by a gel fraction test, di erential scanning calorimetry (DSC), Fourier-transform infrared spectroscopy (FTIR), quasi-static tensile tests, nuclear magnetic resonance spectroscopy (1H NMR and 13C NMR), and an in vitro biodegradation test. The best cross-linking time was determined to be 288h. Properties and degradation time can be tailored for specific applications by adjusting the dicarboxylic acid chain length.