Synthesis and properties of indan-based polyacetylenes that feature the highest gas permeability among all the existing polymers

Yanming Hu, Masashi Shiotsuki, Fumio Sanda, Benny D. Freeman, Toshio Masuda

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75 Citations (Scopus)


Acetylenic monomers containing indan and other groups (1a-m) were polymerized with TaCl5-n-Bu4Sn catalyst to give high molecular weight polymers. Most polymers were soluble in common organic solvents including toluene and chloroform, and they afforded free-standing membranes by the solution casting method The onset temperature of weight loss of the polymers were over 400 °C, indicating high thermal stability. Despite the absence of bulky spherical groups, polymethylated indan-containing polymer membranes showed extremely high gas permeability. In particular, the oxygen permeability coefficients of polymers having 1,1,3,3-tetramethylindan and either p-fluorophenyl or p,m-difluorophenyl groups (2b and 2e) reached 17 900 and 18 700 barrers, respectively, which are even larger than that of the most permeable polymer known, poly(1-trimefhylsilyl-1-propyne)

Original languageEnglish
Pages (from-to)8525-8532
Number of pages8
Issue number22
Publication statusPublished - 25 Nov 2008
Externally publishedYes

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