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Use of Micro- and Nano-ZnO particles as Catalysts for the Microwave-Assisted Polymerization of D,L-lactide

Published online by Cambridge University Press:  16 March 2015

Heriberto Rodríguez-Tobías ,
Graciela Morales ,
Javier Enríquez ,
Carlos Espinoza-González  and
Daniel Grande
Heriberto Rodríguez-Tobías
Affiliation:
Departamento de Síntesis de Polímeros, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo 140, C.P. 25294, Saltillo, México
Graciela Morales
Affiliation:
Departamento de Síntesis de Polímeros, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo 140, C.P. 25294, Saltillo, México
Javier Enríquez
Affiliation:
Departamento de Síntesis de Polímeros, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo 140, C.P. 25294, Saltillo, México
Carlos Espinoza-González
Affiliation:
Departamento de Síntesis de Polímeros, Centro de Investigación en Química Aplicada, Blvd. Enrique Reyna Hermosillo 140, C.P. 25294, Saltillo, México
Daniel Grande
Affiliation:
Équipe Systèmes Polymères Complexes, Institut de Chimie et des Matériaux Paris-Est, 2-8, rue H. Dunant F-94320 Thiais, France
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Abstract

The use of a catalyst is required to synthesize poly(D,L-lactide) (PLA) and tin (II) 2-ethylhexanoate could be highlighted among them. However, this kind of catalysts can produce bio-dangerous compounds limiting the PLA in medical applications, therefore there is a need to investigate novel bio-safe catalysts. Taking into account this problem, this communication reports the use of micro- and nano-ZnO particles as catalysts for the microwave-assisted polymerization of D,L-lactide. By microwave heating a high monomer conversion (higher than 95%) was achieved in a relatively short reaction time (3 hours). Morphology/size and concentration of ZnO particles presented a strong effect on the production of PLA, star-like microparticles leaded to conversion ca. 25%, well below to the values achieved with the nanoparticles. Furthermore, the formation of a ZnO-PLA hybrid was evidenced by spectroscopic and thermal characterization techniques. The methodology herein developed represents a new pathway for the green synthesis of PLA.

Keywords

polymerizationZnoxide
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1767: Symposium 5C – New Trends in Polymer Chemistry and Characterization , 2015 , pp. 3 - 9
Copyright
Copyright © Materials Research Society 2015 

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References

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