TY - JOUR
T1 - Nanoporous crystalline phases of poly(2,6-dimethyl-1,4-phenylene)oxide
AU - Daniel, Christophe
AU - Longo, Simona
AU - Fasano, Gianluca
AU - Vitillo, Jenny G.
AU - Guerra, Gaetano
PY - 2011/7/12
Y1 - 2011/7/12
N2 - 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.
AB - 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.
KW - Nanoporous crystalline modifications
KW - co-crystalline phases
KW - nitrogen adsorption isotherms
KW - sorption of organic compounds
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U2 - 10.1021/cm200546r
DO - 10.1021/cm200546r
M3 - Article
AN - SCOPUS:79959922376
SN - 0897-4756
VL - 23
SP - 3195
EP - 3200
JO - Chemistry of Materials
JF - Chemistry of Materials
IS - 13
ER -