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001-es BibID:	BIBFORM043092
Első szerző:	Keczánné Üveges Andrea (vegyész)
Cím:	Synthesis of Polymeric Nanoparticles by Cross-Linking Copolymerization / Üveges Andrea, Szalóki Melinda, Hartmann John F., Hegedűs Csaba, Borbély János
Dátum:	2008
ISSN:	0024-9297 1520-5835
Megjegyzések:	Soluble cross-linked nanoparticles were prepared by free radical copolymerization of styrene (ST, M1) and ethylene glycol dimethacrylate (EGDM, M2) monomers in homogeneous solution. Spherical nanoparticles were obtained in the early stage of polymerization, and no gelation occurred up to 66% of yield. The isolated particles are decorated with pendant vinyl groups that are target for further polymerization. The molar feed ratio was ST/EGDM = 5/5, the monomer concentration 0.556 mol/dm3 and the initiator concentration 5 mol %. It was found that as the conversion increased, the ratio of pendant vinyl groups reached a maximum value; however, the size of nanoparticles continued to increase with the reaction time. The molecular weight distributions were monomodal at short reaction times (30 and 60 min), however, at longer reaction times (90, 120, and 180 min) these became multimodal. This was caused by intraparticle reactions (branching and cross-linking) and possibly also by interparticle reactions (coupling). The reactive vinyl groups were detected by nuclear magnetic resonance spectroscopy (NMR). The size of nanoparticles in swollen state was determined by dynamic laser light scattering (DLS) method and in dried form by scanning electron microscopy (SEM). Molecular weight and distributions were measured by gel permeation chromatography (GPC).
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban egyetemen (Magyarországon) készült közlemény
Megjelenés:	Macromolecules. - 41 : 4 (2008), p. 1223-1228. -
További szerzők:	Szalóki Melinda (1981-) (vegyész) Hartmann, John F. Hegedűs Csaba (1953-) (fogszakorvos) Borbély János (1950-) (vegyész)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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