TY - JOUR
T1 - Solution-crystallization and related phenomena in 9,9-dialkyl-fluorene polymers. I. Crystalline polymer-solvent compound formation for poly(9,9-dioctylfluorene)
AU - Perevedentsev, Aleksandr
AU - Stavrinou, Paul N.
AU - Bradley, Donal D.C.
AU - Smith, Paul
N1 - Generated from Scopus record by KAUST IRTS on 2019-11-27
PY - 2015/11/1
Y1 - 2015/11/1
N2 - Polymer-solvent compound formation, occurring via co-crystallization of polymer chains and selected small-molecular species, is demonstrated for the conjugated polymer poly(9,9-dioctylfluorene) (PFO) and a range of organic solvents. The resulting crystallization and gelation processes in PFO solutions are studied by differential scanning calorimetry, with X-ray diffraction providing additional information on the resulting microstructure. It is shown that PFO-solvent compounds comprise an ultra-regular molecular-level arrangement of the semiconducting polymer host and small-molecular solvent guest. Crystals form following adoption of the planar-zigzag β-phase chain conformation, which, due to its geometry, creates periodic cavities that accommodate the ordered inclusion of solvent molecules of matching volume. The findings are formalized in terms of nonequilibrium temperature-composition phase diagrams. The potential applications of these compounds and the new functionalities that they might enable are also discussed.
AB - Polymer-solvent compound formation, occurring via co-crystallization of polymer chains and selected small-molecular species, is demonstrated for the conjugated polymer poly(9,9-dioctylfluorene) (PFO) and a range of organic solvents. The resulting crystallization and gelation processes in PFO solutions are studied by differential scanning calorimetry, with X-ray diffraction providing additional information on the resulting microstructure. It is shown that PFO-solvent compounds comprise an ultra-regular molecular-level arrangement of the semiconducting polymer host and small-molecular solvent guest. Crystals form following adoption of the planar-zigzag β-phase chain conformation, which, due to its geometry, creates periodic cavities that accommodate the ordered inclusion of solvent molecules of matching volume. The findings are formalized in terms of nonequilibrium temperature-composition phase diagrams. The potential applications of these compounds and the new functionalities that they might enable are also discussed.
UR - http://doi.wiley.com/10.1002/polb.23798
UR - http://www.scopus.com/inward/record.url?scp=84941790798&partnerID=8YFLogxK
U2 - 10.1002/polb.23798
DO - 10.1002/polb.23798
M3 - Article
SN - 1099-0488
VL - 53
JO - Journal of Polymer Science, Part B: Polymer Physics
JF - Journal of Polymer Science, Part B: Polymer Physics
IS - 21
ER -