Synthesis and Thin Film Phase Behaviour of Functional Rod-Coil Block Copolymers Based on Poly(para-phenylenevinylene) and Poly(lactic acid)

Christoph H. Braun; Benjamin Schopf; Chheng Ngov; Cyril Brochon; Georges Hadziioannou; Edward J. W. Crossland; Sabine Ludwigs

doi:10.1002/marc.201100012

Journal articles

Synthesis and Thin Film Phase Behaviour of Functional Rod-Coil Block Copolymers Based on Poly(para-phenylenevinylene) and Poly(lactic acid)

Christoph H. Braun ^{1, 2, 3, 4} Benjamin Schopf ^{1, 2, 3} Chheng Ngov ^{1, 5} Cyril Brochon ⁶ Georges Hadziioannou ⁶ Edward J. W. Crossland ^{1, 2, 3} Sabine Ludwigs ^{1, 2, 3, 4, *}

* Corresponding author

1 Univ Stuttgart, Inst Polymerchem

2 Freiburger Materialforschungszentrum

3 Freiburg Institute for Advanced Studies

4 Univ Freiburg, Inst Makromol Chem

5 Laboratoire d'Ingenierie des Polymères pour les Hautes Technologies

6 THEME 3

LCPO - Laboratoire de Chimie des polymères organiques, Laboratoire d'Ingenierie des Polymères pour les Hautes Technologies

Abstract : We report the synthesis of a series of block copolymers consisting of a rod-like semiconducting poly(2,5-di(2'-ethylhexyloxy)-1,4-phenylenevinylene) (DEH-PPV) block and a flexible poly(lactic acid) (PLA) block that can be selectively degraded under mild conditions. Such selectively degradable block copolymers are designed as self-assembling templates for bulk heterojunction donor-acceptor layers in organic solar cells. A lamellar microphase-separated domain structure was identified for block copolymers with PLA volume fractions between 29 and 79% in bulk and thin films using SAXS, TEM, and AFM. Depending on the ratio of the two blocks we find either lamellae oriented parallel or perpendicular to the substrate in thin films.

Keywords : atomic force microscopy conjugated polymers diblock copolymers phase separation thin films

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Journal articles

Domain :

Chemical Sciences / Polymers

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Submitted on : Tuesday, February 25, 2014 - 11:21:01 AM
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Synthesis and Thin Film Phase Behaviour of Functional Rod-Coil Block Copolymers Based on Poly(para-phenylenevinylene) and Poly(lactic acid)

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Synthesis and Thin Film Phase Behaviour of Functional Rod-Coil Block Copolymers Based on Poly(para-phenylenevinylene) and Poly(lactic acid)

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