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Thermal behavior of poly(α-n-alkyl β-L-aspartate)s

  • Organic Compounds
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Abstract

A series of poly(α-n-alkyl β-L-aspartate)s (n being the number of carbon atoms in the linear alkyl side chain, withn=1, 2, 4, 6, 8, 12, 18 and 22), was studied by differential scanning calorimetry and thermogravimetric analysis. The effect of the length of the alkyl group on thermal properties such as stability, melting and crystallization of side chains, was investigated. For the polymers with n≥12, two endothermic peaks at T1 and T2 were detected separating three distinct phases A, B and C. The peak at T1 corresponds to the melting of the crystallized paraffinic side chains (transition A-B), and the peak: at T2 may be attributed to a transition (B-C), implying a liquid crystal phase.

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Authors and Affiliations

  1. Departement de Màquines i Motors Termics, E.T.S.E.I.T., Universitat Politècnica de Catalunya, Colom 11, E-08222, Terrassa

    S. Montserrat, P. Colomer & Y. Calventus

  2. Departament d'Enginyeria Química, E.T.S.E.I.B., Universitat Politècnica de Catalunya, Diagonal 647, E-08028, Barcelona, Spain

    A. Martínez de Ilarduya & S. Muñoz-Guerra

  3. Departamento de Química, Facultad de Ciencias, Universidad de los Andes, 5101A, Mérida, Venezuela

    F. López-Carrasquero

Authors
  1. S. Montserrat
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  2. P. Colomer
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  3. Y. Calventus
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  4. F. López-Carrasquero
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  5. A. Martínez de Ilarduya
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  6. S. Muñoz-Guerra
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Additional information

This work has been supported by DGICYT PB-93-0960 and PB-93-1241. F.L.-C. acknowledges financial assistance from the Venezuelan institutions Universidad de Los Andes and Fundayacucho.

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Montserrat, S., Colomer, P., Calventus, Y. et al. Thermal behavior of poly(α-n-alkyl β-L-aspartate)s. Journal of Thermal Analysis 49, 693–702 (1997). https://doi.org/10.1007/BF01996753

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  • DOI: https://doi.org/10.1007/BF01996753

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