Molecular Mobility in Oriented and Unoriented Membranes Based on Poly[2-(Aziridin-1-yl)ethanol]
| Autor: | R. Teruel-Juanes, Amparo Ribes-Greus, José Antonio Reina, Robert Graf, José David Badia, Victor Sáenz de Sáenz de Juano-Arbona, Krzysztof Artur Bogdanowicz, Marta Giamberini |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Mesogen Supramolecular chemistry Substituent Ionic bonding General Chemistry Polymer Química Article dielectric relaxation spectra lcsh:QD241-441 chemistry.chemical_compound Crystallography Membrane poly[2-(aziridin-1-yl)ethanol] (PAZE) chemistry lcsh:Organic chemistry Dendrimer dendronic liquid crystal membranes segmental dynamics macromolecular cooperativity Glass transition Materials |
| Zdroj: | Polymers Volume 13 Issue 7 Polymers, Vol 13, Iss 1060, p 1060 (2021) Teruel-Juanes, Roberto Bogdanowicz, Krzysztof Artur Badia Valiente, José David Sáenz de Juano-Arbona, V. Graf, Robert Reina, José A. Giamberini, Marta Ribes Greus, A. 2021 Molecular Mobility in Oriented and Unoriented Membranes Based on Poly[2-(Aziridin-1-yl)ethanol] Polymers 13 7 1060 RODERIC. Repositorio Institucional de la Universitat de Valéncia instname |
| ISSN: | 2073-4360 |
| Popis: | Unoriented and oriented membranes based on dendronized polymers and copolymers obtained by chemical modification of poly[2-(aziridin-1-yl) ethanol] (PAZE) with the dendron 3,4,5-tris[4-(n-dodecan-1-yloxy)benzyloxy]benzoate were considered. DSC, XRD, CP-MAS NMR and DETA, contribute to characterize the tendency to crystallize, the molecular mobility of the benzyloxy substituent, the dendritic liquid crystalline group and the clearing transition. The orientation of the mesogenic chain somewhat hindered this molecular motion, especially in the full substituted PAZE. The fragility, free volume and thermal expansion coefficients of these membranes near the glass transition are related to the orientation and the addition of the dendritic groups. PAZE-based membranes combine both order and mobility on a supramolecular and macroscopic level, controlled by the dendritic group and the thermal orientation, and open the possibility of preparing membranes with proper channel mobility that promotes selective ionic transport. |
| Databáze: | OpenAIRE |
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