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Effect of Block Thickness on Solvent Response of Block Copolymer Brushes: A Combinatorial Study With Block Copolymer Brush Gradients



Chang Xu, Tao Wu, Charles M. Drain, J Batteas, Michael J. Fasolka, Kathryn L. Beers


Block copolymer (BC) brush gradient libraries were explored as high-throughput platforms to study the effect of relative block thickness on the BC response to solvent. BC brushes of n-butyl methacrylate (BMA) and 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA) were synthesized via surface-initiated atom transfer radical polymerization (ATRP). The gradient libraries synthesized have uniform bottom BMA blocks and molecular mass gradient top blocks. The rearrangement of the BC brushes upon exposure to water and hexane was assessed by water contact angle (WCA) measurements. It is found that the solvent response behavior of the BC brushes is greatly influenced by their individual block thickness. While surface response properties can be suppressed by the extension of top block thickness, they are also enhanced by the increased bottom block thickness. In addition, our work suggests that BC brushes could be fabricated to provide tuneable surfaces with gradient responsive properties.
39 No 9


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Xu, C. , Wu, T. , Drain, C. , Batteas, J. , Fasolka, M. and Beers, K. (2006), Effect of Block Thickness on Solvent Response of Block Copolymer Brushes: A Combinatorial Study With Block Copolymer Brush Gradients, Macromolecules, [online], (Accessed April 21, 2024)
Created March 1, 2006, Updated February 19, 2017