Atom Transfer Radical Polymerization (ATRP) has been applied to synthesize liquid crystalline methacrylic polymers having three-arms star structure, starting from a central core of C3 symmetry. By just changing the duration of the polymerization process, macromolecules having distinct average chain lengths with low polydispersity values and well defined end-groups have been obtained. All the obtained star-shaped polymers, characterized by differential scanning calorimetry and polarized optical microscopy, exhibit smectic and nematic liquid-crystalline phases on heating, with transition temperatures strongly dependent on the average polymerization degree, and high cleaning points.

Synthesis by ATRP and properties of liquid crystalline three-armed star polymers containing azobenzene chromophores

ANGIOLINI, LUIGI;BENELLI, TIZIANA;GIORGINI, LORIS;SALATELLI, ELISABETTA;ZUCCHERI, TOMMASO
2007

Abstract

Atom Transfer Radical Polymerization (ATRP) has been applied to synthesize liquid crystalline methacrylic polymers having three-arms star structure, starting from a central core of C3 symmetry. By just changing the duration of the polymerization process, macromolecules having distinct average chain lengths with low polydispersity values and well defined end-groups have been obtained. All the obtained star-shaped polymers, characterized by differential scanning calorimetry and polarized optical microscopy, exhibit smectic and nematic liquid-crystalline phases on heating, with transition temperatures strongly dependent on the average polymerization degree, and high cleaning points.
L. Angiolini; T. Benelli; L. Giorgini; F. Paris; E. Salatelli; T. Zuccheri
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/47351
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