Photoresponsive Azopolyester–PMMA Block Copolymers Obtained by Combination of ATRP,Polycondensation, and “Click” Chemistry |
| |
Authors: | Cristina Berges Irakli Javakhishvili Søren Hvilsted Carlos Sánchez Rafael Alcalá |
| |
Institution: | 1. Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC‐Universidad de Zaragoza, Departamento de Física de la Materia Condensada, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain;2. Technical University of Denmark, Department of Chemical and Biochemical Engineering, Danish Polymer Center, Building 227, DK‐2800 Kgs. Lyngby, Denmark |
| |
Abstract: | Novel azobenzene‐containing block copolymers (BCs) with a polyester block bearing azobenzene moieties in the side chain and a poly (methyl methacrylate) (PMMA) block have been synthesized by the combination of atom transfer radical polymerization (ATRP), polycondensation, and “click” chemistry. Two azide‐terminated polyesters with different molecular weight (obtained by polycondensation) were coupled to an alkyne‐functionalized PMMA (obtained by ATRP). Blends of the BC with the highest azo content (wt%) and an azopolyester homopolymer were also prepared. All these compounds were investigated by polarized light optical microscopy (POM), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM). Polarized light‐induced anisotropy was studied by birefringence and dichroism measurements. |
| |
Keywords: | azo polymers block copolymers click chemistry photo‐induced anisotropy polycondensation |
|
|