RT info:eu-repo/semantics/article T1 Segmented-block poly(ether amide)s containing flexible polydisperse polyethyleneoxide sequences and rigid aromatic amide moieties A1 Trigo López, Miriam A1 Reglero Ruiz, José Antonio A1 Peredo Guzmán, Patricia D. A1 Peredo, Patricia D. A1 Mendía Jalón, Aránzazu A1 Muñoz Santamaría, María Asunción A1 García García, Félix Clemente A1 García Pérez, José Miguel K1 condensation monomers K1 aromatic polyamides K1 polyethyleneoxide K1 segmented block copolymers K1 Química K1 Chemistry K1 Materiales K1 Materials AB We describe the synthesis and characterization of three novel aromatic diamines containing oxyethylene sequences of different lengths. These diamines were polymerized using the low-temperature solution polycondensation method with isophthaloyl chloride (IPC), terepthaloyl chloride (TPC), [1,1’-biphenyl]-4,4’-dicarbonyl dichloride (BDC), and 4,4′-oxybis(benzoyl chloride) (OBE), obtaining twelve poly(ether amide)s with short segments of polydisperse polyethyleneoxide (PEO) sequences in the polymer backbone. These polymers show reasonably high molecular mass materials (Mw > 12,000), and the relationship between their structure and properties has been carefully studied. Compared with conventional polyamides containing monodisperse PEO sequences, the polydispersity of the PEO segments within the structural units exerts a significant influence on the crystallinity, flexibility, solubility, and the thermal properties of the polymers. For instance, the all-para oriented polyamides (TPCP-A), with an average number of 8.2 ethylenoxide units per structural unit can be transformed conventionally (Tm = 259 °C) in comparison with thermally untransformable polymer with 2 ethylenoxide units (Tm = 425 °C) PB MDPI YR 2021 FD 2021-06 LK http://hdl.handle.net/10259/5806 UL http://hdl.handle.net/10259/5806 LA eng NO FEDER (Fondo Europeo de Desarrollo Regional), the Spanish Agencia Estatal de Investigación (PID2020-113264RB-I00/AEI/10.13039/501100011033) and (PID2019-108583RJ-I00/AEI/ 10.13039/501100011033), and the Consejería de Educación—Junta de Castilla y León (BU306P18 DS Repositorio Institucional de la Universidad de Burgos RD 29-mar-2024