A series of side-chain polymers with a bifunctional repeating unit are prepared by post-polymerization functionalization of poly(propargyl methacrylate) (PPMA) with several azides derived from bis(hydroxymethyl)propionic acid (bis-MPA). The azide incorporates one photoresponsive 4-cyanoazobenzene unit and one photoinert promesogenic moiety at each repeating unit. Both the effect of the photoinert (4-cyanobipheynyl vs 4-cyanotolane) and of the linking group (ester vs carbamate) on the liquid crystalline properties and the generation of optical anisotropy, linear or circular birefringences are explored.

Tuning the Thermal Properties of Azopolymers Synthesized by Post-Functionalization of Poly(propargyl Methacrylate) with Azobenzene Azides: Influence on the Generation of Linear and Circular Birefringences

Audia, Biagio;Pagliusi, Pasquale;Provenzano, Clementina;Cipparrone, Gabriella
2018

Abstract

A series of side-chain polymers with a bifunctional repeating unit are prepared by post-polymerization functionalization of poly(propargyl methacrylate) (PPMA) with several azides derived from bis(hydroxymethyl)propionic acid (bis-MPA). The azide incorporates one photoresponsive 4-cyanoazobenzene unit and one photoinert promesogenic moiety at each repeating unit. Both the effect of the photoinert (4-cyanobipheynyl vs 4-cyanotolane) and of the linking group (ester vs carbamate) on the liquid crystalline properties and the generation of optical anisotropy, linear or circular birefringences are explored.
azopolymers; circular birefringence; light polarization; linear birefringence; Condensed Matter Physics; Physical and Theoretical Chemistry; Polymers and Plastics; Organic Chemistry; Materials Chemistry2506 Metals and Alloys
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11770/288627
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