Nanoporous crystalline phases of poly(2,6-dimethyl-1,4-phenylene)oxide

Christophe Daniel, Simona Longo, Gianluca Fasano, Jenny G. Vitillo, Gaetano Guerra

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Crystalline modifications, exhibiting largely different X-ray diffraction patterns, have been obtained for poly(2,6-dimethyl-1,4-phenylene)oxide (PPO), by gel desiccation procedures as well as by solvent-induced crystallization of amorphous films. The choice of the solvent allows controlling the nature of the crystalline phase. Both amorphous and semicrystalline samples of this commercial thermoplastic polymer exhibit a high uptake of large guest molecules (like, e.g., benzene or carbon tetrachloride), both from vapor phases and from diluted aqueous solutions. Surprisingly, the semicrystalline PPO samples present guest solubility much higher than fully amorphous PPO samples. These sorption experiments, as well as density measurements and classical Brunauer-Emmett- Teller (BET) experiments, clearly indicate that the obtained PPO crystalline phases are nanoporous. For these thermally stable PPO-based materials exhibiting nanoporous crystalline and amorphous phases, many applications are predictable.

Original languageEnglish (US)
Pages (from-to)3195-3200
Number of pages6
JournalChemistry of Materials
Volume23
Issue number13
DOIs
StatePublished - Jul 12 2011

Keywords

  • Nanoporous crystalline modifications
  • co-crystalline phases
  • nitrogen adsorption isotherms
  • sorption of organic compounds

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