Publications by authors named "Izabela Lukaszewska"
The molecular dynamics, with an emphasis on the calorimetric and dynamic glass transitions, of non-isocyanate polyhydroxyurethanes (PHUs) produced by the equimolar polyaddition of polyether-based dicyclic carbonates (P-CCs) and various short diamines was studied. The diamine component consisted of a short aliphatic diamine (1,4-diaminobutane, DAB) and a more complex 'characteristic' diamine. The study was conducted to investigate (i) the chemical structure of the characteristic amine, (ii) its molar ratio, and (iii) the structure and molar mass of the P-CC.
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- The study examines how non-isocyanate polyurethane (NIPU) networks, modified with octa(3-hydroxy-3-methylbutyldimethylsiloxy)POSS, interact with water in varying humidity levels.
- The results indicate that adding up to 10 wt% of 8OHPOSS does not impede the NIPU's water affinity, likely due to its even dispersion within the polymer matrix.
- Furthermore, water absorption causes a reduction in the glass transition temperature (Tg) of the materials, attributed to the formation of stronger water-polymer hydrogen bonds, which disrupt existing polymer-polymer interactions.
Recently, silsesquioxanes (SSQ) and polyhedral oligomeric silsesquioxanes (POSS) have gained much interest in the area of biomaterials, mainly due to their intrinsic properties such as biocompatibility, complete non-toxicity, the ability to self-assemble and to form a porous structure, facilitating cell proliferation, creating a superhydrophobic surface, osteoinductivity, and ability to bind hydroxyapatite. All the above has resulted in new developments in medicine. However, the application of POSS-containing materials in dentistry is still at initial stage and deserves a systematic description to ensure future development.
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- * New environmentally friendly methods are being developed to create non-isocyanate polyurethanes (NIPUs) by reacting cyclic carbonates with polyfunctional amines, resulting in safer synthesis and unique properties.
- * This review summarizes the latest advancements in NIPU synthesis, modification, and processing, highlighting methods for integrating various additives into NIPU matrices for enhanced performance.