Cylinder-to-gyroid phase transition in a rod–coil diblock copolymer

Shih-Hsiang Lin; Chun-Chih Ho; Wei-Fang Su

doi:10.1039/C2SM07473G

Cylinder-to-gyroid phase transition in a rod–coil diblock copolymer

Shih-Hsiang Lin,^a Chun-Chih Ho^a and Wei-Fang Su*^a

* Corresponding authors

^a Department of Materials Science and Engineering, National Taiwan University, 1, Roosevelt Road, Section 4, Taipei-106, Taiwan
E-mail: suwf@ntu.edu.tw
Fax: +886-2-23634562
Tel: +886-2-33664078

Abstract

In this communication, the morphology of well-defined P3DDT-b-PMMA with a 65.2% PMMA coil volume fraction is revealed as a hexagonally packed cylinder structure by X-ray scattering experiments after thermal annealing. Upon heating, an order-to-order transition (OOT) between cylindrical and gyroidal structures is observed at temperatures above 170 °C. The evolution of the cylinder to the gyroid occurs while the crystalline structure of the P3DDT block disappears, suggesting the conformation of the P3DDT-b-PMMA at high temperatures is similar to coil–coil block copolymers. The phenomena reported here can provide a different viewpoint of the self-assembly behaviors of poly(3-alkylthiophene)-containing rod–coil block copolymers. The novel rare gyroid structure of this rod–coil copolymer is useful to fabricate long sought of bicontinuous structure for highly efficient polymer solar cells.

Supplementary files

Publication details

The article was received on 27 Dec 2011, accepted on 20 Mar 2012 and first published on 03 Apr 2012

Article type: Communication

DOI: 10.1039/C2SM07473G

Citation: Soft Matter, 2012,8, 4890-4893

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Cylinder-to-gyroid phase transition in a rod–coil diblock copolymer

S. Lin, C. Ho and W. Su, Soft Matter, 2012, 8, 4890
DOI: 10.1039/C2SM07473G
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Soft Matter

Cylinder-to-gyroid phase transition in a rod–coil diblock copolymer

Abstract

Supplementary files

Publication details

Cylinder-to-gyroid phase transition in a rod–coil diblock copolymer

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