2026-05-04T10:50:57Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/58062023-01-26T09:07:14Zcom_10259_4313com_10259_5086com_10259_2604col_10259_4314

00925njm 22002777a 4500 dc Trigo López, Miriam author Reglero Ruiz, José A. author Peredo Guzmán, Patricia D. author Peredo, Patricia D. author Mendía Jalón, Aránzazu author Muñoz Santamaría, María Asunción author García García, Félix Clemente author García Pérez, José Miguel author 2021-06 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) http://hdl.handle.net/10259/5806 10.3390/ma14112804 1996-1944 condensation monomers aromatic polyamides polyethyleneoxide segmented block copolymers Segmented-block poly(ether amide)s containing flexible polydisperse polyethyleneoxide sequences and rigid aromatic amide moieties