eprintid: 518 rev_number: 10 eprint_status: archive userid: 2 dir: disk0/00/00/05/18 datestamp: 2022-03-08 23:55:06 lastmod: 2022-06-01 13:10:49 status_changed: 2022-03-08 23:55:06 type: article metadata_visibility: show creators_name: Pali-Casanova, Ramón creators_name: Yam Cervantes, Marcial Alfredo creators_name: Zavala-Loría, José creators_name: Loría-Bastarrachea, María creators_name: Aguilar-Vega, Manuel creators_name: Dzul Lopez, Luis Alonso creators_name: Sámano Celorio, María Luisa creators_name: Crespo-Álvarez, Jorge creators_name: García Villena, Eduardo creators_name: Agudo-Toyos, Pablo creators_name: Méndez-Martínez, Francisco creators_id: creators_id: creators_id: creators_id: creators_id: creators_id: luis.dzul@unini.edu.mx creators_id: marialuisa.samano@uneatlantico.es creators_id: jorge.crespo@uneatlantico.es creators_id: eduardo.garcia@uneatlantico.es creators_id: pablo.agudo@uenatlantico.es creators_id: title: Effect of Sulfonic Groups Concentration on IEC Properties in New Fluorinated Copolyamides ispublished: pub subjects: uneat_eng divisions: uneatlantico_produccion_cientifica divisions: uninimx_produccion_cientifica full_text_status: public keywords: Polyamides; Sulfonation; Ion exchange capacity; Proton conductivity abstract: Seven aromatic polyamides and copolyamides were synthesized from two different aromatic diamines: 4,4′-(Hexafluoroisopropylidene)bis(p-phenyleneoxy)dianiline (HFDA) and 2,4-Aminobenzenesulfonic acid (DABS). The synthesis was carried out by polycondensation using isophthaloyl dichloride (1SO). The effect of an increasing molar concentration of the sulfonated groups, from DABS, in the copolymer properties was evaluated. Inherent viscosity tests were carried out to estimate molecular weights. Mechanical tests were carried out under tension, maximum strength ( σ max), Young’s modulus (E), and elongation at break (εmax) to determine their mechanical properties. Tests for water sorption and ion exchange capacity (IEC) were carried out. Proton conductivity was measured using electrochemical impedance spectroscopy (EIS). The results indicate that as the degree of sulfonation increase, the greater the proton conductivity. The results obtained showed conductivity values lower than the commercial membrane Nafion 115 of 0.0065 S cm−1. The membrane from copolyamide HFDA/DABS/1S0-70/30 with 30 mol DABS obtained the best IEC, with a value of 0.747 mmol g−1 that resulted in a conductivity of 2.7018 × 10−4 S cm−1, lower than the data reported for the commercial membrane Nafion 115. According to the results obtained, we can suggest that further developments increasing IEC will render membranes based on aromatic polyamides that are suitable for their use in PEM fuel cells. date: 2019 publication: Polymers volume: 11 number: 7 pagerange: 1169 id_number: doi:10.3390/polym11071169 refereed: TRUE issn: 2073-4360 official_url: http://doi.org/10.3390/polym11071169 access: open language: en citation: Artículo Materias > Ingeniería Universidad Europea del Atlántico > Investigación > Producción Científica Universidad Internacional Iberoamericana México > Investigación > Producción Científica Abierto Inglés Seven aromatic polyamides and copolyamides were synthesized from two different aromatic diamines: 4,4′-(Hexafluoroisopropylidene)bis(p-phenyleneoxy)dianiline (HFDA) and 2,4-Aminobenzenesulfonic acid (DABS). The synthesis was carried out by polycondensation using isophthaloyl dichloride (1SO). The effect of an increasing molar concentration of the sulfonated groups, from DABS, in the copolymer properties was evaluated. Inherent viscosity tests were carried out to estimate molecular weights. Mechanical tests were carried out under tension, maximum strength ( σ max), Young’s modulus (E), and elongation at break (εmax) to determine their mechanical properties. Tests for water sorption and ion exchange capacity (IEC) were carried out. Proton conductivity was measured using electrochemical impedance spectroscopy (EIS). The results indicate that as the degree of sulfonation increase, the greater the proton conductivity. The results obtained showed conductivity values lower than the commercial membrane Nafion 115 of 0.0065 S cm−1. The membrane from copolyamide HFDA/DABS/1S0-70/30 with 30 mol DABS obtained the best IEC, with a value of 0.747 mmol g−1 that resulted in a conductivity of 2.7018 × 10−4 S cm−1, lower than the data reported for the commercial membrane Nafion 115. According to the results obtained, we can suggest that further developments increasing IEC will render membranes based on aromatic polyamides that are suitable for their use in PEM fuel cells. metadata Pali-Casanova, Ramón; Yam Cervantes, Marcial Alfredo; Zavala-Loría, José; Loría-Bastarrachea, María; Aguilar-Vega, Manuel; Dzul Lopez, Luis Alonso; Sámano Celorio, María Luisa; Crespo-Álvarez, Jorge; García Villena, Eduardo; Agudo-Toyos, Pablo y Méndez-Martínez, Francisco mail SIN ESPECIFICAR, SIN ESPECIFICAR, SIN ESPECIFICAR, SIN ESPECIFICAR, SIN ESPECIFICAR, luis.dzul@unini.edu.mx, marialuisa.samano@uneatlantico.es, jorge.crespo@uneatlantico.es, eduardo.garcia@uneatlantico.es, pablo.agudo@uenatlantico.es, SIN ESPECIFICAR (2019) Effect of Sulfonic Groups Concentration on IEC Properties in New Fluorinated Copolyamides. Polymers, 11 (7). p. 1169. ISSN 2073-4360 document_url: http://repositorio.unini.edu.mx/id/eprint/518/1/polymers-11-01169-v2.pdf