Polymeric Cross-Linked Surface Treatments for Controlling Block Copolymer Orientation in Thin Films

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• 作者：Christopher M. Bates ; Jeffrey R. Strahan ; Logan J. Santos ; Brennen K. Mueller ; Benjamin O. Bamgbade ; Jonathan A. Lee ; Joshua M. Katzenstein ; Christopher J. Ellison ; C. Grant Willson
• 刊名：Langmuir
• 出版年：2011
• 出版时间：March 1, 2011
• 年：2011
• 卷：27
• 期：5
• 页码：2000-2006
• 全文大小：1097K
• 年卷期：v.27,no.5(March 1, 2011)
• ISSN：1520-5827

文摘

The orientation of cylinder-forming poly(styrene-block-methyl methacrylate) [P(S-b-MMA)] was investigated on two sets of polymeric surface treatments: 10 para-substituted polystyrene derivatives with <10 mol % poly(4-vinylbenzyl azide) and a series of poly(styrene-random-4-vinylbenzyl azide) [P(S-r-VBzAz)] copolymers with 5鈭?00 mol % poly(4-vinylbenzyl azide). The copolymers were spin-coated to form thin films and then cross-linked by heating. The resulting films exhibited a range of surface tensions from 21 to 45 dyn/cm. Perpendicular orientation of P(S-b-MMA) cylinders was achieved with poly(p-bromostyrene) and all the [P(S-r-VBzAz)] copolymer surface treatments, most notably the homopolymer of poly(4-vinylbenzyl azide). Films made from these simple copolymers are as effective as random terpolymer alignment layers commonly made from both block monomers and a cross-linkable monomer.