Author, as appears in the article.: Xavier Montané; Krzysztof Artur Bogdanowicz; Gianmarco Colace; Jose Antonio Reina; Pierfrancesco Cerruti; Albena Lederer; Marta Giamberini
Department: Química Analítica i Química Orgànica Enginyeria Química
URV's Author/s: MONTANÉ MONTANÉ, XAVIER; Krzysztof Artur Bogdanowicz; Gianmarco Colace; REINA LOZANO, JOSÉ ANTONIO; Pierfrancesco Cerruti; Albena Lederer; GIAMBERINI ., MARTA
Keywords: Chemical modification Columnar mesophase Membranes
Abstract: Poly[2-(aziridin-1-yl)ethanol] (PAZE) is a suitable polyamine candidate which can be dendronised with 3,4,5-tris[4-(n-dodecan-1-yloxy)benzyloxy]benzoic acid (TAP) in order to obtain liquid crystalline columnar polyamines, as previously reported. However, the resulting copolymers evidenced a strong tendency to crystallise which leads to the detriment of columnar phase stability and the mechanical properties of the resulting polymeric membranes. In order to overcome this drawback, we successfully prepared LC columnar polyamines based on poly[2-(aziridin-1-yl)ethanol] modified with both TAP and benzoyl chloride at different extents. The presence of the dendron group induces self-assembling into a columnar structure, due to an exo-recognition of the side-chain dendrons, while the benzoyl group is expected to inhibit polymer crystallinity. All copolymers, except one, have lower melting points and exhibit higher clearing temperatures (Tc), when compared to the LC polyamines obtained by modification of PAZE with TAP only, reported in previous studies. In all cases they exhibited LC columnar mesophases after annealing, as inferred by DSC, XRD and POM. When casted as membranes, these columnar copolyamines can be homeotropically oriented under thermal treatment at optimal conditions, as was confirmed by X-ray diffraction studies at low 2θ angles. Additionally, SEM microscopy was used in order to evaluate the morphology of the prepared membranes.
Research group: Polimers Meteorgrup
Thematic Areas: Química Química Chemistry
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0032-3861
Author identifier: 0000-0002-1426-239X; 0000-0001-8526-626X; n/a; 0000-0002-9245-4135; 0000-0003-0822-2866; n/a; 0000-0001-8278-3552
Record's date: 2016-11-23
Last page: 309
Journal volume: 105
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0032386116309661?via%3Dihub
Article's DOI: 10.1016/j.polymer.2016.10.047
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
First page: 298
Publication Type: Article Artículo Article
Repositori URV