Controlled polymerization of DL-lactide using a Schiff's base al-alkoxide initiator derived from 2-hydroxyacetophenone

SummaryThe kinetics of DL-lactide polymerization was studied in CH2Cl2 at 25°C and in toluene at 70°C with HAPENAlOMe, a new Schiff's base complex derived from 2-hydroxyacetophenone and ethylenediamine. A higher polymerization rate is observed with this initiator as compared to other previously...

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Bibliographic Details
Published inPolymer bulletin (Berlin, Germany) Vol. 44; no. 1; pp. 31 - 38
Main Authors BHAW-LUXIMON, A, JHURRY, D, SPASSKY, N
Format Journal Article
LanguageEnglish
Published Heidelberg Springer 17.02.2000
Berlin Springer Nature B.V
New York, NY
Subjects
Alkoxides
Applied sciences
Dichloromethane
Ethylenediamine
Exact sciences and technology
Initiators
NMR
Nuclear magnetic resonance
Organic polymers
Physicochemistry of polymers
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
Toluene
Transesterification
Solvent effect
Ring opening polymerization
Phenolate
Organic ligand
Temperature effect
Aryloxy complex
Complex catalyst polymerization
Experimental study
Lactone polymer
Aluminium Complexes
Schiff base
Lactic acid polymer
Kinetics
Rate constant
Catalyst activity
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Summary:SummaryThe kinetics of DL-lactide polymerization was studied in CH2Cl2 at 25°C and in toluene at 70°C with HAPENAlOMe, a new Schiff's base complex derived from 2-hydroxyacetophenone and ethylenediamine. A higher polymerization rate is observed with this initiator as compared to other previously reported Al-alkoxides complexes. The polymerization with HAPENAlOMe is also shown to be a living process in both solvents. Moreover, the polymerization proceeds to quite high conversion without significant occurrence of transesterification reactions as confirmed from 13C NMR and SEC analysis.
ISSN:0170-0839
1436-2449
DOI:10.1007/s002890050570