The Development of the L-Lactide Polymerisation Procedures
Razvoj postupaka polimerizacije L-laktida
Author
Tanasic, Ljiljana
Marinovic-Cincovic, Milena
Ristic, Ivan
Erceg, Tamara
Teofilovic, Vesna
Vukic, Nevena
Budinski-Simendic, Jaroslava
Keywords
poly(L-lactide)polymerisation
biodegradability
mocrowave syyhesys
initiator
poli(laktid)
polimerizacija
biorazgradivost
mikrotalasna sinteza
inicijator
Metadata
Show full item recordAbstract
To determine the appropriate conditions for the polymerization of (Llactide),
to obtain poly(L-lactide) a few different methods were applied: in closed vials
under vacuum, in the reactor under high pressure, in the microwave reactor and in a
reactor with solvent using the initiator. The molecular masses of prepared samples were
determined using GPC method. It was assessed that by microwave synthesis method for
the polymerization time less than 30 minutes the resulting polymer have the highest
molecular mass, 178.000 g mol-1. It was estimated that the samples synthesized with
trifluoromethanesulfonic acid as initiator have the best thermal stability. Za određivanje optimalnih uslova za polimerizacije (L- laktida), za dobijanje
poli (L-laktida) (PLLA) primenjene su različite metode polimerizacije: u zatvorenim
posudama pod vakumom, u reaktoru pod visokim pritiskom, mikrotalasnom polju i u
rastvoru sa inicijatorom. Za određivanje molekulskih masa korišćena je GPC metoda.
Ustanovljeno je da je mikrotalasna sinteza postupak sa najkraćim vremenom
polimerizacije (manjim od 30 minuta) pri čemu je nastaje polimer koji ima najveću
molarnu masu 178.000 g mol-1. Najbolju termičku stabilnost imao je uzorak PLLA
sintetisan sa trifluorometansulfonskom kiselinom kao inicijatorom.