2026-04-20T02:43:56Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/95232024-09-04T00:05:21Zcom_10259_4313com_10259_5086com_10259_2604col_10259_4314

2024-09-03T10:25:57Z urn:hdl:10259/9523 Boosting m-aramids performance with p-oriented aromatic amide side chains Miguel Ortega, Alvaro Vallejos Calzada, Saúl García Pérez, José Miguel Trigo López, Miriam Mechanical performance Thermal properties Hydrogen bonding High performance Side chain Application in hydrogen environments This study aimed to enhance the mechanical properties of m-aramids by incorporating varying percentages of p-aramid side chains through copolymerization while ensuring solubility for practical applications. The mechanical performance of the resulting copolymers was compared with the commercial m-aramid, MPIA (poly(m-phenylene terephthalamide)). Notably, even with a 20% incorporation of p-aramid side chains, there was a substantial increase of 48% in Young’s modulus and 7% in tensile strength compared to MPIA. Additionally, the nitro group capping the p-aramid side chains demonstrated significant efficacy in enhancing the mechanical performance of the materials upon exposure to hydrogen. Specifically, there was an increase of more than 11% in Young’s modulus upon initial contact with hydrogen. This finding suggests potential applications in protective coatings for stainless steel used in high-pressure hydrogen storage environments. In such applications, exposure to hydrogen can accelerate embrittlement and limit operational lifespan, and coating with these materials can mitigate embrittlement and improve operational lifespan. 2024-09-03T10:25:57Z 2024-09-03T10:25:57Z 2024-10 info:eu-repo/semantics/article 0014-3057 http://hdl.handle.net/10259/9523 10.1016/j.eurpolymj.2024.113397 eng European Polymer Journal. 2024, V. 219, 113397 https://doi.org/10.1016/j.eurpolymj.2024.113397 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-108583RJ-I00/ES/POLIAMIDAS AROMATICAS MICRO Y NANOCELULARES REFORZADAS COMO MATERIALES DE ALTAS PRESTACIONES EN APLICACIONES DE SEGURIDAD, PROTECCION Y TRANSPORTE/ info:eu-repo/grantAgreement/UAM//CA1%2FRSUE%2F2021-00409/ http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Atribución 4.0 Internacional Elsevier