Fluorinated poly(arylene ether)s with aliphatic chain appended cardo moiety: Synthesis and gas transport properties
2014
Ghosha, Śiprā | Banerjee, Susanta
The effect of cardo moiety together with long aliphatic chain in the poly(arylene ether)s (PAEs) on gas transport properties has been investigated. Accordingly, this article reports the synthesis of a new cardo bisfluoro monomer with long aliphatic chain; 9,9-bis(2-ethylhexyl)-2,7-bis[4-fluoro-3-trifluoromethylphenyl]-9H-fluorene and its polymerization with six different bishydroxy monomers. The monomer and the PAEs were characterized by elemental analysis, NMR, and FTIR techniques. The molecular weights of the PAEs were determined by GPC. Thermal and mechanical properties of the PAEs were also investigated. The polymers showed Tg up to 189°C, 10% degradation temperature up to 427°C and 420°C under nitrogen and air atmosphere respectively, tensile strength up to 64MPa and dielectric constant (ϵ) as low as 2.33. Gas transport properties of these PAE membranes were investigated at 35°C using four different gases (e.g., CH4, N2, O2 and CO2). The PAEs showed high gas permeability [P(CO2)=74.65] and permselectivity [α(CO2/CH4)=61.69] in comparison with many other previously reported PAEs.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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