caa a22 4500 445385316 CHVBK 20180317143030.0 cr unu---uuuuu 170323e20110601xx s 000 0 eng 10.1007/s10924-011-0297-1 doi (NATIONALLICENCE)springer-10.1007/s10924-011-0297-1 The Properties of Poly( l -Lactide) Prepared by Different Synthesis Procedure [Elektronische Daten] [Ivan Ristić, Ljiljana Tanasić, Ljubiša Nikolić, Suzana Cakić, Olivera Ilić, Radmila Radičević, Jaroslava Budinski-Simendić] Different synthesis methods were applied to determine optimal conditions for polymerization of (3S)-cis-3,6-dimethyl-1,4-dioxane-2,5-dione (l-lactide), in order to obtain poly(l-lactide) (PLLA). Bulk polymerizations (in vacuum sealed vessel, high pressure reactor and in microwave field) were performed with tin(II) 2-ethylhexanoate as the initiator. Synthesis in the vacuum sealed vessel was carried out at the temperature of 150°C. To reduce the reaction time second polymerization process was carried out in the high pressure reactor at 100°C and at the pressure of 138kPa. The third type of rapid synthesis was done in the microwave reactor at 100°C, using frequency of 2.45GHz and power of 150W at the temperature of 100°C. The temperature in this method was controlled via infrared system for in-bulk measuring. The solution polymerization (with trifluoromethanesulfonic acid as initiator) was possible even at the temperature of 40°C, yielding PLLA with narrow molecular weight distribution in a very short period of time (less than 6h). The obtained polymers had the number-average molecular weights ranging from 43,000 to 178,000gmol−1 (polydispersity index ranging from 1 to 3) according to the gel permeation chromatography measurements. The polymer structure was characterized by Fourier transform infrared and NMR spectroscopy. Thermal properties of the obtained polymers were investigated using thermogravimetry and differential scanning calorimetry. Springer Science+Business Media, LLC, 2011 Poly(lactide) nationallicence Cationic polymerization nationallicence Microwave polymerization nationallicence FTIR nationallicence NMR nationallicence Ristić Ivan Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut Tanasić Ljiljana Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut Nikolić Ljubiša Faculty of Technology, University of Nis, Bulevar oslobođenja 124, 16000, Leskovac, Serbia aut Cakić Suzana Faculty of Technology, University of Nis, Bulevar oslobođenja 124, 16000, Leskovac, Serbia aut Ilić Olivera Faculty of Technology, University of Nis, Bulevar oslobođenja 124, 16000, Leskovac, Serbia aut Radičević Radmila Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut Budinski-Simendić Jaroslava Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/2(2011-06-01), 419-430 1566-2543 19:2<419 2011 19 10924 https://doi.org/10.1007/s10924-011-0297-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10924-011-0297-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ristić Ivan Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut NATIONALLICENCE 700 1- Tanasić Ljiljana Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut NATIONALLICENCE 700 1- Nikolić Ljubiša Faculty of Technology, University of Nis, Bulevar oslobođenja 124, 16000, Leskovac, Serbia aut NATIONALLICENCE 700 1- Cakić Suzana Faculty of Technology, University of Nis, Bulevar oslobođenja 124, 16000, Leskovac, Serbia aut NATIONALLICENCE 700 1- Ilić Olivera Faculty of Technology, University of Nis, Bulevar oslobođenja 124, 16000, Leskovac, Serbia aut NATIONALLICENCE 700 1- Radičević Radmila Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut NATIONALLICENCE 700 1- Budinski-Simendić Jaroslava Faculty of Technology, University of Novi Sad, Bulevar cara Lazara 1, 21000, Novi Sad, Serbia aut NATIONALLICENCE 773 0- Journal of Polymers and the Environment Springer US; http://www.springer-ny.com 19/2(2011-06-01), 419-430 1566-2543 19:2<419 2011 19 10924 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer