New poly (imide) s bearing alkyl side-chains: A study on the impact of size and shape of lateral groups on thermal, mechanical, and gas transport properties.

dc.creatorFidel E. Rodríguez González
dc.creatorGermán Pérez
dc.creatorVladimir Niebla
dc.creatorIgnacio Jessop
dc.creatorRudy Martin-Trasanco
dc.creatorDeysma Coll
dc.creatorPablo Ortiz
dc.creatorManuel de Jesús Aguilar Vega
dc.creatorLuis Hernán Tagle
dc.creatorClaudio Terraza
dc.creatorAlain Tundidor
dc.date2020
dc.date.accessioned2023-07-21T19:19:27Z
dc.date.available2023-07-21T19:19:27Z
dc.identifierhttp://cicy.repositorioinstitucional.mx/jspui/handle/1003/1899
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7737451
dc.descriptionA set of five new aromatic poly(imide)s (PIs) incorporating pendant acyclic alkyl moieties were synthesized. The difference among them was the length and bulkiness of the pendant group, which comprises of linear alkyl chains from three to six carbon atoms, and a tert-butyl moiety. The effect of the side group length on the physical, thermal, mechanical, and gas transport properties was analyzed. All PIs exhibited low to moderate molecular weights (Mn ranged between 27.930–58.970 Da, and Mw ranged between 41.760–81.310 Da), good solubility in aprotic polar solvents, except for PI-t-4, which had a tert-butyl moiety and was soluble even in chloroform. This behaviour was probably due to the most significant bulkiness of the side group that increased the interchain distance, which was corroborated by the X-ray technique (PI-t-4 showed two d-spacing values: 5.1 and 14.3 Å). Pure gas permeabilities for several gases were reported (PI-3 (Barrer): He(52); H2(46); O2(5.4); N2(1.2); CH4(1.1); CO2(23); PI-t-4 (Barrer): He(139); H2(136); O2(16.7); N2(3.3); CH4(2.3); CO2(75); PI-5 (Barrer): He(44); H2(42); O2(5.9); N2(1.4); CH4(1.2); CO2(27); PI-6 (Barrer): He(45); H2(43); O2(6.7); N2(1.7); CH4(1.7); CO2(32)). Consistent higher volume in the side group was shown to yield the highest gas permeability. All poly(imide)s exhibited high thermal stability with 10% weight loss degradation temperature between 448–468 °C and glass transition temperature between 240–270 °C. The values associated to the tensile strength (45–87 MPa), elongation at break (3.2–11.98%), and tensile modulus (1.43–2.19 GPa) were those expected for aromatic poly(imide)s.
dc.formatapplication/pdf
dc.languageeng
dc.relationinfo:eu-repo/semantics/datasetDOI/10.3390/membranes10070141
dc.relationcitation:Rodríguez-González, F. E., Pérez, G., Niebla, V., Jessop, I., Martin-Trasanco, R., Coll, D., ... & Tundidor-Camba, A. (2020). New poly (imide) s bearing alkyl side-chains: A study on the impact of size and shape of lateral groups on thermal, mechanical, and gas transport properties. Membranes, 10(7), 141.
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceMembranes, 10(7), 141, 2020.
dc.subjectinfo:eu-repo/classification/Autores/AROMATIC POLY(IMIDE)S
dc.subjectinfo:eu-repo/classification/Autores/BULKY PENDANT GROUPS
dc.subjectinfo:eu-repo/classification/Autores/GAS PERMEABILITY
dc.subjectinfo:eu-repo/classification/Autores/STRUCTURE-PROPERTY RELATIONSHIP
dc.subjectinfo:eu-repo/classification/cti/7
dc.subjectinfo:eu-repo/classification/cti/33
dc.subjectinfo:eu-repo/classification/cti/3312
dc.subjectinfo:eu-repo/classification/cti/331208
dc.subjectinfo:eu-repo/classification/cti/331208
dc.titleNew poly (imide) s bearing alkyl side-chains: A study on the impact of size and shape of lateral groups on thermal, mechanical, and gas transport properties.
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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