Ring-opening polymerization behavior of l-lactide catalyzed by aluminum alkyl catalysts

The l-lactide polymerization using trimethylaluminum (TMA), triethylaluminum (TEAL), trioctylaluminum (TOA), triisobutylaluminum (TIBA), and aluminum isopropoxide (Al(O-i-Pr)3) were studied to produce a PLA. The conversion, turnover frequency (TOF), and molecular weight of TIBA were higher than thos...

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Veröffentlicht in:Journal of industrial and engineering chemistry (Seoul, Korea) 2013, 19(4), , pp.1137-1143
Hauptverfasser: Yoo, Ji Yun, Kim, Youngjo, Ko, Young Soo
Format: Artikel
Sprache:eng
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Zusammenfassung:The l-lactide polymerization using trimethylaluminum (TMA), triethylaluminum (TEAL), trioctylaluminum (TOA), triisobutylaluminum (TIBA), and aluminum isopropoxide (Al(O-i-Pr)3) were studied to produce a PLA. The conversion, turnover frequency (TOF), and molecular weight of TIBA were higher than those of Al(O-i-Pr)3 with the polymerization time of 5min. In the case of 15min, the conversion of aluminum alkyls was lower than that of Al(O-i-Pr)3, but the molecular weight of PLA produced by aluminum alkyl was relatively high in comparison with the catalytic activity of Al(O-i-Pr)3. TMA, TEAL, and TIBA seemed to have lower propagation rates and much lower termination rates than Al(O-i-Pr)3.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2012.12.010