A Noncubic Triply Periodic Network Morphology in Poly(isoprene-b-styrene-b-ethylene oxide) Triblock Copolymers

2002 ◽  
Vol 35 (18) ◽  
pp. 7007-7017 ◽  
Author(s):  
Travis S. Bailey ◽  
Cordell M. Hardy ◽  
Thomas H. Epps ◽  
Frank S. Bates
Keyword(s):  
Ethylene Oxide ◽  
Triblock Copolymers ◽  
Triply Periodic ◽  
Network Morphology

Symmetric Poly(ethylene oxide-b-styrene-b-isoprene) Triblock Copolymers: Synthesis, Characterization, and Self-Assembly in Bulk and Thin Film

2014 ◽  
Vol 47 (18) ◽  
pp. 6373-6381 ◽  
Author(s):  
Yali Qiao ◽  
Rachel Ferebee ◽  
Bongjoon Lee ◽  
Indranil Mitra ◽  
Nathaniel A. Lynd ◽  
...  
Keyword(s):  
Thin Film ◽  
Ethylene Oxide ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Micellization of pH-sensitive poly(butadiene)-block -poly(2 vinylpyridine)-block -poly(ethylene oxide) triblock copolymers: Complex formation with anionic surfactants

2017 ◽  
Vol 134 (38) ◽  
pp. 45313 ◽  
Author(s):  
Leonard Ionut Atanase ◽  
Jean-Philippe Lerch ◽  
Simona Caprarescu ◽  
Camelia Elena Iurciuc Tincu ◽  
Gerard Riess
Keyword(s):  
Complex Formation ◽  
Ethylene Oxide ◽  
Anionic Surfactants ◽  
Triblock Copolymers ◽  
Ph Sensitive ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Anionic polymerization of activated oxetane and its copolymerization with ethylene oxide for the synthesis of amphiphilic block copolymers

2018 ◽  
Vol 9 (19) ◽  
pp. 2660-2668 ◽  
Author(s):  
Matthieu Gervais ◽  
Antoine Forens ◽  
Emmanuel Ibarboure ◽  
Stephane Carlotti
Keyword(s):  
Block Copolymers ◽  
Ethylene Oxide ◽  
Anionic Polymerization ◽  
Triblock Copolymers ◽  
Amphiphilic Block Copolymers ◽  
Tetraoctylammonium Bromide

The anionic polymerization of oxetane in toluene was achieved using a combination of tetraoctylammonium bromide and simple triisobutylaluminum. By its copolymerization with ethylene oxide, di- and triblock copolymers were prepared in one and two steps respectively.

scholarly journals Identification of Some New Triply Periodic Mesophases from Molten Block Copolymers

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1081 ◽  
Author(s):  
Junhan Cho
Keyword(s):  
Block Copolymers ◽  
Mirror Reflection ◽  
Free Energies ◽  
Consistent Field ◽  
Mesophase Formation ◽  
Triply Periodic ◽  
Self Consistent ◽  
Self Consistent Field ◽  
Self Consistent Field Theory ◽  
Network Morphology

Using field-theoretic simulations based on a self-consistent field theory (SCFT) with or without finite compressibility, nanoscale mesophase formation in molten linear AB and ABC block copolymers is investigated in search of candidates for new and useful nanomaterials. At selected compositions and segregation strengths, the copolymers are shown to evolve into some new nanostructures with either unusual crystal symmetry or a peculiar morphology. There exists a holey layered morphology with Im3 symmetry, which lacks one mirror reflection compared with Im3m symmetry. Also, a peculiar cubic bicontinuous morphology, whose channels are connected with tetrapod units, is found to have Pn3m symmetry. It is shown that there is another network morphology with tripod connections, which reveals P432 symmetry. The optimized free energies of these new mesophases and their relative stability are discussed in comparison with those of double gyroids and double diamonds.

Preparation of Gold Nanocrystals Having Various Morphologies under Polymeric Bulk Phase

2014 ◽  
Vol 548-549 ◽  
pp. 321-325
Author(s):  
Sang Ho Cha
Keyword(s):  
Ethylene Oxide ◽  
Functional Groups ◽  
Triblock Copolymer ◽  
Triblock Copolymers ◽  
Synthetic Approach ◽  
Gold Nanocrystals ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
Poly Propylene ◽  
Polymeric Template

A novel synthetic approach for gold nanocrystals using triblock copolymer as a polymeric template was described. The triblock copolymer used in this study was poly (ethylene oxide)20-poly (propylene oxide)70-poly (ethylene oxide)20 with hydroxy or thiol end-functional groups. The complexes of HAuCl4 and triblock copolymers were prepared by mixing and drying. After exposed to the sunlight for a few days, the gold nanocrystals, which have different sizes and shapes according to the ripening time, end functional groups, and gold salt concentrations, were obtained. The optical properties of the gold nanocrystals were also discussed.

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