Találati lista | Tudóstér

001-es BibID:	BIBFORM113662
035-os BibID:	(cikkazonosító)2937 (Scopus)85164750542 (WoS)001028649300001
Első szerző:	Czifrák Katalin (vegyész)
Cím:	Bisphenol A Diglycidyl Ether-Primary Amine Cooligomer-poly (epszilon-caprolactone) Networks: Synthesis and Characterization / Katalin Czifrák, Csilla Lakatos, Gabriella Szabó, Bence Vadkerti, Lajos Daróczi, Miklós Zsuga, Sándor Kéki
Dátum:	2023
ISSN:	2073-4360
Megjegyzések:	In this work, the preparation and systematic investigation of cross-linked polyurethane-epoxy (PU-EP) polymer systems are reported. The PU-EP polymers were prepared using a reaction of isocyanate (NCO)-terminated PU-prepolymer with diglycidyl ether of bisphenol A (DGEBA)-amine cooligomer. The oligomerization of DGEBA was carried out by adding furfurylamine (FA) or ethanolamine (EA), resulting in DGEBA-amine cooligomers. For the synthesis of NCO-terminated PU-prepolymer, poly(?-caprolactone)diol (PCD) (Mn = 2 kg/mol) and 1,6-hexamethylene diisocyanate (HDI) were used. The cross-linking was achieved by adding DGEBA-amine cooligomer to PU-prepolymer, in which the obtained urethane bonds, due to the presence of free hydroxil groups in the activated DGEBA, served as netpoints. During cross-linking, ethanolamine provides an additional free hy- droxyl group for the formation of a new urethane bond, while furfurylamine can serve as a thermoreversible coupling element (e.g., Diels?Alder adduct). The PU-EP networks were characterized using attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR), differential scanning calorimetry (DSC), dynamical mechanical analysis (DMA) and scanning electron microscopy (SEM). The DMA curves of some PU-EPs (depending on the compositions and the synthetic method) revealed a plateau-like region above the melting temperature (Tm) of PCD, confirming the presence of a cross-linked structure. This property resulted in a shape memory (SM) behavior for these samples, which can be fine-tuned in the presence of furfurylamine through the formation of additional thermoreversible bonds (e.g., Diels-Alder adduct).
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk DGEBA-amine cooligomer polyurethane DGEBA-polyurethane characterization shape memory
Megjelenés:	Polymers. - 15 : 13 (2023), p. 1-15. -
További szerzők:	Lakatos Csilla (1990-) (környezetmérnök) Szabó Gabriella Vadkerti Bence (1994-) (okleveles vegyészmérnök) Daróczi Lajos (1965-) (fizikus) Zsuga Miklós (1944-) (polimer kémikus) Kéki Sándor (1964-) (polimer kémikus)
Pályázati támogatás:	GINOP-2.3.3-15-2016-00021 GINOP TKP2021-EGA-20 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: