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Self-Assembly of a Triblock Copolymer in the Presence of a Rigid Conjugated Polyelectrolyte

Journal Article · · Macromolecules
 [1];  [2];  [3];  [4];  [2]
  1. University of Washington, Seattle, WA (United States); University of Washington
  2. University of Washington, Seattle, WA (United States)
  3. Argonne National Laboratory (ANL), Argonne, IL (United States)
  4. Australian Nuclear Science and Technology Organisation (ANSTO) (Australia); University of New South Wales (Australia)

The properties of conducting polymers are strongly influenced by structural changes induced by long-range order, which can be achieved by using block copolymers that self-assemble into crystalline structures. These blends result in unique mesophases distinct from the pure components with self-assembly behavior modulated by solution conditions and polymer architectures. High-throughput small-angle X-ray scattering data of aqueous Pluronic P123 (PEO20–PPO70–PEO20) and conjugated polyelectrolyte poly[3-(potassium-4-butanoate) thiophene-2,5-diyl] (PPBT) blends at various concentrations and temperatures were automatically classified into phase maps by autophasemap, an unsupervised statistical analysis algorithm. The outlined phase boundaries revealed that adding PPBT to high P123 concentrations induced a transition from cubicly ordered spherical micelles to hexagonally packed cylindrical micelles. Shear alignment via rheological small-angle neutron scattering of the blends produced monolithic oriented cubic and hexagonal crystal gels. Furthermore, these insights into the self-assembly of conductive polymer blends will aid in the design of soft materials with tunable structural and electronic properties.

Research Organization:
University of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF); National Science Foundation (NSF)
Grant/Contract Number:
SC0019911; AC02-06CH11357
OSTI ID:
2480293
Journal Information:
Macromolecules, Journal Name: Macromolecules Journal Issue: 24 Vol. 57; ISSN 0024-9297
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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