Molecular Mobility in Oriented and Unoriented Membranes Based on Poly[2-(Aziridin-1-yl)ethanol]

Polymers

JoseA. Reina¹  KrzysztofArtur Bogdanowicz²  Marta Giamberini²  Roberto Teruel-Juanes³  Amparo Ribes-Greus³  Victor Sáenz de Juano-Arbona³  Robert Graf⁴  JoseD. Badia⁵ 

[1] Department of Analytical Chemistry and Organic Chemistry. Universitat Rovira i Virgili (URV), C/Marcel·lí Domingo s/n, 43007 Tarragona, Spain;Department of Chemical Engineering, Universitat Rovira i Virgili (URV), Av. Països Catalans, 26, 43007 Tarragona, Spain;Institute of Technology of Materials (ITM), Universitat Politècnica de València (UPV), Camí de Vera, s/n, 46022 València, Spain;Max Planck Institute for Polymer Research, Ackermannweg 10, 55021 Mainz, Germany;Polymer Technology and Sustainability Group, Department of Chemical Engineering, School of Engineering, Universitat de València (UVEG), Avinguda de la Universitat s/n, 46100 Burjassot, Spain;

关键词: dielectric relaxation spectra;    macromolecular cooperativity;    segmental dynamics;    dendronic liquid crystal membranes;    poly[2-(aziridin-1-yl)ethanol] (PAZE);   

DOI  :  10.3390/polym13071060

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown