Abstract

In this work we report the synthesis of a new diamine monomer, 1-adamantylmethyl[3,5-bis-{2′-trifluoromethyl-4′-(4″-aminophenyl)phenoxy}]benzoate and its polymerization with four different diacids. The monomer and the prepared poly(ether amide)s (PAs) were characterized by elemental analyses, NMR, and FTIR techniques. The polymers were further characterized by GPC and thermal techniques and the mechanical properties of the films prepared from these polymers are also reported. The permeability of CH4, N2, O2 and CO2 through these PA membranes was investigated at three different temperatures (35, 45 and 55°C) under an applied upstream pressure of 3.5bar. The PA 9B containing hexafluoroisopropylidene moiety exhibited highest permselectivity in the series (for, O2/N2=8.2 and CO2/CH4=41.7) whereas PA 9A containing tert-butyl moiety exhibited highest gas permeability (PCO2=34 and PO2=9.5). The gas transport properties have been correlated with the polymer structures with respect to their glass transition temperature, chain packing and dielectric constant values. The activation energies of the permeation and diffusion processes were calculated.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.