Synthesis and characterization of new polyimides from diphenylpyrene dianhydride and ortho methyl substituted diamines

dc.creatorRITA DEL ROSARIO SULUB SULUB
dc.creatorMaría Isabel de los Dolores Loría Bastarrachea
dc.creatorJOSE LUIS SANTIAGO GARCIA
dc.creatorManuel de Jesús Aguilar Vega
dc.date2018
dc.date.accessioned2023-07-21T19:18:40Z
dc.date.available2023-07-21T19:18:40Z
dc.identifierhttp://cicy.repositorioinstitucional.mx/jspui/handle/1003/1558
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/7737118
dc.descriptionThree new polyimides were synthesized via one-step polycondensation from 3,8-diphenylpyrene-1,2,6,7-tetracarboxylic dianhydride (DPPD) with two diamines with ortho methyl substitution (MBDAM and HFI) and one diamine without ortho substituents (BAPHF). The effect of diamine structure in DPPD based polyimides' physical, thermal, mechanical and gas transport properties has been studied. The polyimide structure was confirmed by FTIR and 1H NMR. All polymers show high thermal stability with decomposition temperatures above 493 °C, and glass transition temperatures above 336 °C. Changes in packing density of polyimide membranes were assessed by wide angle X-ray diffraction and correlated to fractional free volume FFV. Polyimides based on rigid DPPD dianhydride exhibited an improved gas permeability and selectivity when ortho methyl substituents are present in the diamine used for polyimide synthesis. DPPD-MBDAM polyimide showed the best gas productivity values with 565 barrer CO2 permeability and a selectivity of 16 for CO2/CH4.
dc.formatapplication/pdf
dc.languageeng
dc.relationinfo:eu-repo/semantics/datasetDOI/10.1039/c8ra05991h
dc.relationinfo:eu-repo/semantics/altIdentifier/DOI/10.1039/c8ra05991h
dc.relationcitation:Sulub-Sulub, R., Loría-Bastarrachea, M. I., Santiago-García, J. L., & Aguilar-Vega, M. (2018). Synthesis and characterization of new polyimides from diphenylpyrene dianhydride and ortho methyl substituted diamines. RSC Advances, 8(56), 31881-31888.
dc.rightsinfo:eu-repo/semantics/openAccess
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0
dc.sourceRSC Advances, 8(56), 31881-31888, 2018.
dc.subjectinfo:eu-repo/classification/Autores/AMINES
dc.subjectinfo:eu-repo/classification/Autores/CARBON DIOXIDE
dc.subjectinfo:eu-repo/classification/Autores/GAS PERMEABILITY
dc.subjectinfo:eu-repo/classification/Autores/GLASS TRANSITION
dc.subjectinfo:eu-repo/classification/cti/7
dc.subjectinfo:eu-repo/classification/cti/7
dc.titleSynthesis and characterization of new polyimides from diphenylpyrene dianhydride and ortho methyl substituted diamines
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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