Linear high molecular weight ladder polymers by optimized polycondensation of tetrahydroxytetramethylspirobisindane and 1,4-dicyanotetrafluorobenzene

Jingshe Song, Naiying Du, Ying Dai, Gilles P. Robertson, Michael D. Guiver, Sylvie Thomas, Ingo Pinnau

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

A study on the optimization of conditions for polycondensation of 3,3,3′,3′-tetramethyl-1,1′-spirobisindane-5,5′,6, 6′-tetrol, TTSBI, with 1,4-dicyanotetrafluorobenzene (DCTB) in dimethylformamide (DMF) at 50-70 °C is reported. A linear PIM-1 polymer (PIM = polymer with intrinsic microporosity) with high molecular weight was obtained by optimized reaction conditions. Of the solvents tested, DMF was the preferred solvent for this reaction. The optimized molar ratio TTSBI/DCTB/K 2CO3 was 1/1/2.04. The mechanism of PIM-1 cross-linking during polymerization was studied, and gel-free, high molecular weight PIM-1 polymer was prepared. The physical properties of anhydrous K2CO 3 significantly affected the reaction rate, Flexible tough polymer films were cast from PIM-1 solution in chloroform, and pure permeability data are reported for several gases.

Original languageEnglish (US)
Pages (from-to)7411-7417
Number of pages7
JournalMacromolecules
Volume41
Issue number20
DOIs
StatePublished - Oct 28 2008

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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