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Characterization of Polyesters Obtained by Enzyme-Catalyzed Ring-Opening Polymerization of Pentadecanolide at high Temperature

Published online by Cambridge University Press:  16 March 2015

W. Herrera-Kao ,
M. Cervantes-Uc ,
T. Lara-Ceniceros  and
M. Aguilar-Vega
W. Herrera-Kao
Affiliation:
Centro de Investigación Científica de Yucatán, A.C.; Unidad de Materiales., Calle 43 No. 130, Col. Chuburná de Hidalgo, C.P. 97200, Mérida, Yucatán, México Centro de Investigación en Materiales Avanzados, S.C., Unidad Monterrey, Alianza Norte 202 Parque de Investigación e Innovación Tecnológica, C.P. 66600; Apodaca, Nuevo León, México.
M. Cervantes-Uc
Affiliation:
Centro de Investigación Científica de Yucatán, A.C.; Unidad de Materiales., Calle 43 No. 130, Col. Chuburná de Hidalgo, C.P. 97200, Mérida, Yucatán, México
T. Lara-Ceniceros
Affiliation:
Centro de Investigación en Materiales Avanzados, S.C., Unidad Monterrey, Alianza Norte 202 Parque de Investigación e Innovación Tecnológica, C.P. 66600; Apodaca, Nuevo León, México.
M. Aguilar-Vega
Affiliation:
Centro de Investigación Científica de Yucatán, A.C.; Unidad de Materiales., Calle 43 No. 130, Col. Chuburná de Hidalgo, C.P. 97200, Mérida, Yucatán, México
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Abstract

Differences on physicochemical properties of poly(pentadecanolide), PPDL, synthesized by enzymatic ring opening polymerization at two different temperatures, 70 C and 90 C, using Novozyme-430 were assessed. PPDL synthesized at 90°C presents lower molecular weight and crystallinity than the one prepared at 70°C. It was detected by FTIR that PPDL synthesized at 90°C presents a large amorphous phase with more terminal OH groups. A difference in the melting and crystallization behavior was detected by differential scanning calorimetry, DSC, where the melting of the PPDL synthesized at 90°C presents multiple melting and crystallization events at lower temperature than those exhibit by PPDL synthesized at 70°C which presents a well defined single melting and crystallization event. The differences in melting behavior are attributed to the presence of a larger amorphous phase in PPDL synthesized at 90°C due to increased number of terminal OH groups that disrupt the crystalline structure. Thermal stability is also higher in PPDL synthesized at 70°C since the onset of decomposition starts 50°C above that observed in PPDL obtained at 70°C.

Keywords

polymerizationbiological synthesis (chemical reaction)catalytic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1767: Symposium 5C – New Trends in Polymer Chemistry and Characterization , 2015 , pp. 35 - 41
Copyright
Copyright © Materials Research Society 2015 

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