Issue 19, 2012

Disorder-to-order transitions induced by alkyne/azide click chemistry in diblock copolymer thin films

Abstract

We investigated thin film morphologies of binary blends of alkyne-functionalized diblock copolymer poly(ethylene oxide)-block-poly(n-butyl methacrylate-random-propargyl methacrylate) (PEO-b-P(nBMA-r-PgMA)) and Rhodamine B azide, where the thermal alkyne/azide click reaction between the two components induced a disorder-to-order transition (DOT) of the copolymer. By controlling the composition of the neat copolymers and the mole ratio between the alkyne and azide groups, different microphase separated morphologies were achieved. At higher azide loading ratios, a perpendicular orientation of the microdomains was observed with wide accessible film thickness window. As less azide was incorporated, the microdomains have a stronger tendency to be parallel to the substrate, and the film thickness window for perpendicular orientation also became narrower.

Graphical abstract: Disorder-to-order transitions induced by alkyne/azide click chemistry in diblock copolymer thin films

Supplementary files

Article information

Article type
Paper
Submitted
08 Dec 2011
Accepted
06 Mar 2012
First published
30 Mar 2012

Soft Matter, 2012,8, 5273-5282

Disorder-to-order transitions induced by alkyne/azide click chemistry in diblock copolymer thin films

X. Wei, W. Gu, W. Chen, X. Shen, F. Liu, J. W. Strzalka, Z. Jiang and T. P. Russell, Soft Matter, 2012, 8, 5273 DOI: 10.1039/C2SM07329C

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