Poly( l-lactide) initiated by silver N-heterocyclic carbene complexes: synthesis, characterization and properties.
In: Polymer Bulletin, Jg. 70 (2013-12-01), Heft 12, S. 3475-3485
Online
academicJournal
Zugriff:
Poly( l-lactide) (PLLA) was successfully synthesized by ring-opening polymerization (ROP) in bulk using silver N-heterocyclic carbene (Ag-NHC) complex. The effect of reaction time, temperature and monomer/initiator ratio on polymerization process were determined. The optimum conditions were found as 130 °C, 4 h and M/ I molar ratio of about 100. The polymers were characterized by FTIR, H-NMR, GPC and TG. High-molecular-weight PLLA ( M = 3.78 × 10, M = 1.91 × 10, PDI = 1.97) was synthesized by the ROP of l-lactide (LLA) with bis-( N-methyl N′-dodecylimidazole) silver(I) di-bromo argentate (1a) in bulk. The effect of different N-substituted ligand groups on the polymerization was studied. The antimicrobial activity of the synthesized polymers were investigated by using minimum inhibitory concentration test against gram positive ( Staphylococcus aureus) and gram negative ( Escherichia coli and Pseudomonas aeruginosa). It was observed that the synthesized polymers displayed moderate antimicrobial activity. [ABSTRACT FROM AUTHOR]
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Poly( l-lactide) initiated by silver N-heterocyclic carbene complexes: synthesis, characterization and properties.
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Autor/in / Beteiligte Person: | Balcan, Sıla ; Balcan, Mehmet ; Çetinkaya, Bekir |
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Zeitschrift: | Polymer Bulletin, Jg. 70 (2013-12-01), Heft 12, S. 3475-3485 |
Veröffentlichung: | 2013 |
Medientyp: | academicJournal |
ISSN: | 0170-0839 (print) |
DOI: | 10.1007/s00289-013-1034-9 |
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