Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Edyta Hebda"'
Autor:
Piotr Stachak, Izabela Łukaszewska, Jan Ozimek, Konstantinos Nikolaou Raftopoulos, Artur Bukowczan, Edyta Hebda, Carlos Bujalance Calduch, Krzysztof Pielichowski
Publikováno v:
eXPRESS Polymer Letters, Vol 18, Iss 1, Pp 2-26 (2024)
This work reports on the synthesis of non-isocyanate polyurethanes (NIPUs) obtained via the polyaddition of diamines: dimer fatty acid-derived diamine (DFA diamine) or polyether diamine (PPO diamine) with five-membered tri(cyclic carbonate) by a pre-
Externí odkaz:
https://doaj.org/article/03ad499dba214e9a83b36bb223dc383f
Autor:
Konstantinos N. Raftopoulos, Izabela Łukaszewska, Sebastian Lalik, Paulina Zając, Artur Bukowczan, Edyta Hebda, Monika Marzec, Krzysztof Pielichowski
Publikováno v:
Molecules, Vol 29, Iss 17, p 4057 (2024)
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
Externí odkaz:
https://doaj.org/article/5bd3c698210f4ad9b7f5a7d377cfbb81
Autor:
Tomasz M. Majka, Konstantinos N. Raftopoulos, Edyta Hebda, Adam Szeligowski, Olga Zastawny, Maciej Guzik, Krzysztof Pielichowski
Publikováno v:
Materials, Vol 17, Iss 13, p 3105 (2024)
The inherent brittleness of polyhydroxybutyrate (PHB), a well-studied polyhydroxyalkanoate (PHA), limits its applicability in flexible and impact-resistant applications. This study explores the potential of blending PHB with a different PHA to overco
Externí odkaz:
https://doaj.org/article/ac761a8bd599408c8b41da34b94fe2fd
Publikováno v:
Molecules, Vol 29, Iss 1, p 250 (2024)
This article describes the use of microwave irradiation in the synthesis of bis(cyclo carbonate) compounds (BCCs) in bulk (without solvent) from carbon dioxide capture using an epoxidized compound—a commercial epoxy resin—and compares this proces
Externí odkaz:
https://doaj.org/article/f49ec5c94a0041629b66b2304538a21b
Autor:
Konstantinos N. Raftopoulos, Panagiotis A. Klonos, Patrycja Tworzydło, Jan Ozimek, Edyta Hebda, Apostolos Kyritsis, Krzysztof Pielichowski
Publikováno v:
International Journal of Molecular Sciences, Vol 24, Iss 22, p 16540 (2023)
The glass transition in polyurethanes is a complicated phenomenon governed by a multitude of factors, including the microphase separation, which in turn depends strongly on the molar mass of the hard and soft segments, as well as the presence of addi
Externí odkaz:
https://doaj.org/article/e91e80deafc24dde9aec4b750b7d0d96
Publikováno v:
Polymers, Vol 14, Iss 21, p 4743 (2022)
In this work, we report on flexible toluene diisocyanate (TDI)-based polyurethane foams (FPUFs) chemically modified by POSS moieties, i.e., octa (3-hydroxy-3-methylbutyldimethylsiloxy) POSS (OCTA-POSS) and 1,2-propanediolizo-butyl POSS (PHI-POSS). Th
Externí odkaz:
https://doaj.org/article/fb93e2035bec45de82cc5248a295d65a
Autor:
Traian Zaharescu, Yaxuan Chou, Edyta Hebda, Konstantinos N. Raftopoulos, Krzysztof Pielichowski
Publikováno v:
Polymer Testing, Vol 96, Iss , Pp 107117- (2021)
A series of segmental polyurethane organic inorganic hybrids with polyhedral oligomeric silsesquioxanes (POSS) incorporated along the chain contour on the hard segments is irradiated by γ radiation at doses up to 100 kGy. The effects of this treatme
Externí odkaz:
https://doaj.org/article/189778c266934669bc9194c7907555a8
Publikováno v:
Materials, Vol 14, Iss 13, p 3497 (2021)
Polyurethanes (PUs) are a significant group of polymeric materials that, due to their outstanding mechanical, chemical, and physical properties, are used in a wide range of applications. Conventionally, PUs are obtained in polyaddition reactions betw
Externí odkaz:
https://doaj.org/article/e13c4902ebe14afa91c2bdb185631acb
PEG-POSS Star Molecules Blended in Polyurethane with Flexible Hard Segments: Morphology and Dynamics
Autor:
Konstantinos N. Raftopoulos, Edyta Hebda, Anna Grzybowska, Panagiotis A. Klonos, Apostolos Kyritsis, Krzysztof Pielichowski
Publikováno v:
Molecules, Vol 26, Iss 1, p 99 (2020)
A star polymer with a polyhedral oligomeric silsesquioxanne (POSS) core and poly(ethylene glycol) (PEG) vertex groups is incorporated in a polyurethane with flexible hard segments in-situ during the polymerization process. The blends are studied in t
Externí odkaz:
https://doaj.org/article/719902e4d0f84f8e913d31034d621731
Publikováno v:
Molecules, Vol 24, Iss 22, p 4013 (2019)
In this work, we report for the first time on the influence of polyhedral oligomericsilsesquioxanes (POSS) on the structure and properties of liquid crystalline polyurethane (LCPU). LCPU/POSS hybrids were synthesized via a two-step method. In the fir
Externí odkaz:
https://doaj.org/article/e6d44ed3d9ae41b6b0a7c7c461befe25