Gas Permeability through Polyimides: Unraveling the Influence of Free Volume, Intersegmental Distance and Glass Transition Temperature-Reference-Cited by-同舟云学术

Gas Permeability through Polyimides: Unraveling the Influence of Free Volume, Intersegmental Distance and Glass Transition Temperature

Published:2023-12-19 Issue:1 Volume:16 Page:13
ISSN:2073-4360
Container-title:Polymers
language:en
Short-container-title:Polymers

Author:

Torres Alba¹²^ORCID,Soto Cenit¹²^ORCID,Carmona Javier¹²^ORCID,Comesaña-Gandara Bibiana³⁴^ORCID,de la Viuda Mónica¹²⁵,Palacio Laura¹²^ORCID,Prádanos Pedro¹²^ORCID,Simorte María Teresa⁶,Sanz Inmaculada⁶,Muñoz Raúl²,Tena Alberto¹²^ORCID,Hernández Antonio¹²

Affiliation:

1. Surface and Porous Materials (SMAP), Associated Research Unit to CSIC, Facultad de Ciencias, Universidad de Valladolid, Paseo Belén 7, E-47011 Valladolid, Spain

2. Institute of Sustainable Processes (ISP), Dr. Mergelina s/n, E-47011 Valladolid, Spain

3. Department of Physics and Inorganic Chemistry, University of Valladolid, Paseo Belén 7, E-47011 Valladolid, Spain

4. UI Cinquima, University of Valladolid, Paseo Belén 7, E-47011 Valladolid, Spain

5. Department of Organic Chemistry, University of Valladolid, Paseo Belén 7, E-47011 Valladolid, Spain

6. FCC Medio Ambiente, Avenida Camino de Santiago 40, Edificio 2–Planta 2, E-28050 Madrid, Spain

Abstract

The relationships between gas permeability and free volume fraction, intersegmental distance, and glass transition temperature, are investigated. They are analyzed for He, CO2, O2, CH4, and N2 gases and for five similar polyimides with a wide range of permeabilities, from very low to extremely high ones. It has been established here that there is an exponential relationship between permeability and the free volume fraction, and between permeability and the most probable intersegmental distance as measured by WAXS; in both cases, with an exponential coefficient that depends on the kinetic gas diameter as a quadratic polynomial and with a preexponential positive constant. Moreover, it has been proven that the intersegmental distance increases linearly with the free volume fraction. Finally, it has been established that the free volume fraction increases with the glass transition temperature for the polymers tested, and that they depend on each other in an approximate linear way.

Funder

Ministerio de Ciencia e Innovación

Publisher

MDPI AG

Subject

Polymers and Plastics,General Chemistry

Link

https://www.mdpi.com/2073-4360/16/1/13/pdf

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