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Poly(3-hexylthiophene)-b-poly(3-cyclohexylthiophene): synthesis, microphase separation, thin film transistors, and photovoltaic applications

Wu, Pei-Tzu ; Ren, Guoqiang ; Kim, Felix S. ; Li, Chaoxu ; Mezzenga, Raffaele ; Jenekhe, Samson A.

In: Journal of Polymer Science Part A: Polymer Chemistry, 2010, vol. 48, no. 3, p. 614-626

We report the synthesis, characterization, microphase separation, field-effect charge transport, and photovoltaic properties of regioregular poly(3-hexylthiophene)-b-poly(3-cyclohexylthiophene) (P3HT-b-P3cHT). Two compositions of P3HT-b-P3cHT (HcH63 and HcH77) were synthesized with weight-average molecular weights of 155,500 and 210,800 and polydispersity indices of 1.45 and...

Liquid crystalline period variations in self-assembled block copolypeptides-surfactant ionic complexes

Li, Chaoxu ; Li, Jingguo ; Zhang, Xiuqiang ; Zhang, Afang ; Mezzenga, Raffaele

In: Macromolecular Rapid Communications, 2010, vol. 31, no. 3, p. 265-269

We investigate the complexation of ampholytic poly(N-isopropylacylamide)-block-poly- (L-glutamic acid)-block-poly(L-lysine) (PNiPAM-b-PLG-b-PLLys) triblock copolymers and PNiPAM-block-(PLG-co-PLLys) diblock copolymers with counter charged anionic and cationic surfactants. Both triblock and diblock copolymers are able to selectively form complexes...

Synthesis and self-assembly behavior of poly(fluorenylstyrene)-block-poly(2-vinylpyridine) block copolymers and their blends with single wall carbon nanotubes (SWCNTs)

Li, Chaoxu ; Hsu, Jung-Ching ; Sugiyama, Kenji ; Hirao, Akira ; Chen, Wen-Chang ; Mezzenga, Raffaele

In: Macromolecules, 2009, vol. 42, no. 15, p. 5793–5801

We have synthesized a series of poly[4-(9,9-dihexylfluoren-2-yl)styrene]-block-poly(2-vinylpyridine) (P(St-F1)-b-P2VP) and poly[4-di(9,9-dihexylfluoren-2-yl)styrene]-block-poly(2-vinylpyridine) (P(St-F1₂)-b-P2VP) comblike block copolymers and investigated their self-assembly behavior. The block composition, molecular weight, and the length of the fluorene side chain...

Hierarchical self-organization in polyelectrolyte-surfactant complexes based on heteroarm star block copolyampholytes

Hammond, Matthew R. ; Li, Chaoxu ; Tsitsilianis, Constantinos ; Mezzenga, Raffaele

In: Soft Matter, 2009, vol. 5, no. 12, p. 2371-2377

A novel heteroarm star block terpolymer bearing short polystyrene (PS) arms and an equal number of longer poly(2-vinylpyridine)-block-poly(acrylic acid) (P2VP-b-PAA) arms was used as the macromolecular template component in polyelectrolyte-surfactant supramolecular complexes. The ampholytic nature of this novel star block copolymer allowed complexation to be carried out on either the P2VP blocks...

Crystalline diblock conjugated copolymers: synthesis, self-assembly, and microphase separation of poly(3-butylthiophene)-b-poly(3-octylthiophene)

Wu, Pei-Tzu ; Ren, Guoqiang ; Li, Chaoxu ; Mezzenga, Raffaele ; Jenekhe, and Samson A.

In: Macromolecules, 2009, vol. 42, no. 7, p. 2317–2320

a new level of hierarchical structure control by use of supramolecular self-assembled dendronized block copolymers

Li, Chaoxu ; Schlüter, Dieter A. ; Zhang, Afang ; Mezzenga, Raffaele

In: Advanced Materials, 2008, vol. 20, no. 23, p. 4530 - 4534

Complexation of dendronized block copolymers with sulfate alkyl tails forms unprecedented hierarchically ordered bulk structures, including rectangular-in-lamellar, tetragonal-in-lamellar, hexagonal-in-lamellar and lamellar-in-lamellar. These novel liquid-crystalline morphologies, which can be designed at low length scales in these systems, are expected to provide final materials with not only...

Structure−properties relationship in proton conductive sulfonated polystyrene−polymethyl methacrylate block copolymers (sPS−PMMA)

Rubatat, Laurent ; Li, Chaoxu ; Dietsch, Hervé ; Nykänen, Antti ; Ruokolainen, Janne ; Mezzenga, Raffaele

In: Macromolecules, 2009, vol. 41, no. 21, p. 8130–8137

We report on the dependence of proton conductivity on the morphologies of sulfonated polystyrene−poly(methyl methacrylate) (sPS−PMMA) diblock copolymers. Three different diblock copolymers of varying molecular weight and block volume fraction were studied, and for each one several sulfonation degrees of the PS block were considered. The investigation of the morphologies of the...