Self-organization of OPV-PEG diblock copolymers in THF/water.

Conference · Fri Jul 02 04:00:00 EDT 1999

OSTI ID:11878

Jurban, V; Littrell, K C; Thiyagarajan, P; Wang, H B; Wang, H H; Yu, L

Oligo(phenylenevinylene)-poly(ethyleneglycol) (OPV-PEG) diblock copolymers in tetrahydrofuran (THF) solution at concentrations of 5 to 25 gl self-assemble into rod-like structures with a radius of about 80 {angstrom} for an OPV-PEG diblock copolymer comprising 13 PV and 45 EG monomers. These aggregates consist of a liquid crystalline OPV core and a PEG shell. Addition of about 10% water to the solution induces the formation of a phase of packed rods, as revealed by a sudden and dramatic transition of the scattering pattern. Further addition of water leads to swelling and at about 30% ultimately to disruption of the packed-rod phase.

• Research Organization: Argonne National Lab., IL (US)
• Sponsoring Organization: US Department of Energy (US)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 11878
• Report Number(s): ANL/IPNS/CP-99413
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
AGGLOMERATION
COPOLYMERS
LIQUID CRYSTALS
MORPHOLOGY
PHASE STUDIES
SWELLING
TETRAHYDROFURAN