The Preparation of Branched Copolyesters from Castor Oil as an Initiator
Dobijanje razgranatih kopoliestara od ricinusovog ulja kao inicijatora
Author
Tanasic, Ljiljana
Vukic, Nevena
Aleksic, Vojislav
Teofilovic, Vesna
Erceg, Tamara
Manjencic, Darko
Budinski-Simendic, Jaroslava
Keywords
star-shaped polymersmicrowave synthesys
PLLA
castor oil
renewable resorces
zvezdasti polimeri
mikrotalasna sinteza
ricinusovo ulje
obnovljive sirovine
Metadata
Show full item recordAbstract
Using renewable feedstocks, such as biomass, for the production of polymers can
have both environmental and economic benefits. The goal of this project was to synthesize
the renewable copolymers from monomer l-lactide and castor oil as an initiator. In sample
formulation the mass ratio of the monomer to the initiator was in the range from 4,53 to
21,5. The ring-opening polymerization was carried in a microwave reactor using tin(II)2-
ethylhexanoate as a catalyst. The molar masses of obtained star-shaped polymers were
assessed using SEC method. The thermal properties of the branched polymer were
evaluated using differential scanning calorimetry. The molecular mass of the branched
polymer increased with increasing the feed ratio of lactide and castor oil. Korišćenje obnovljivih sirovina, kao što je biomasa, za proizvodnju
polimera može da ima i ekološke i ekonomske prednosti. Cilj ovog rada je bila sinteza
obnovljivih kopolimera na osnovu monomera L-laktida i ricinusovog ulja kao
inicijatora. U sirovinskom sastavu uzoraka maseni odnos monomera L-laktida i
inicijatora ricinusovog ulja bio je u opsegu od 4,53 do 21,5. Polimerizacija otvaranjem
prstena je izvršena u mikrotalasnom reaktoru primenom kalaj(II)etilheksanoata kao
katalizatora. Molske mase dobijenih zvezdastih polimera su određene pomoću SEC
metode. Toplotna svojstva razgranatih polimera određena su metodom diferencijalne
skenirajuće kalorimetrije. Molske mase razgranatog polimera rastu sa porastom
masenog odnosa laktida i ricinusovog ulja.