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Liquid Crystalline Dendritic Networks Derived from Poly(propylene imine) (PPI) Dendrimers

Authors

  • Mercedes Marcos,

    Corresponding author
    1. Química Orgánica, Facultad de Ciencias-ICMA,Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
    • Química Orgánica, Facultad de Ciencias-ICMA,Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain.
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  • Rafael Martín-Rapún,

    1. Química Orgánica, Facultad de Ciencias-ICMA,Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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  • José-Luis Serrano,

    1. Química Orgánica, Facultad de Ciencias-ICMA,Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain
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  • Antoni Sánchez-Ferrer

    1. Albert-Ludwigs-Universität Freiburg Institut für Makromolekulare CHEMIE Stefan-Meier-Str. 31, D-79104 Freiburg, Germany
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Abstract

Summary: A nematic liquid crystalline network based on a poly(propylene imine) dendrimer [PPI-(NH2)32 (G = 4)] was prepared in the form of films. In the network the PPI dendritic molecules are partially functionalised with a chiral aldehyde and are connected to each other by an achiral dialdehyde. The phase behaviour of the network was investigated by polarising-light optical microscopy, differential scanning calorimetry, and X-ray diffractometry. Thermoelastic measurements ruled out the possible elastomeric nature of the material.

original image

Schematic of the nematic dendritic network prepared here.

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