標題: Self-assembly behavior of A-B diblock and C-D random copolymer mixtures in the solution state through mediated hydrogen bonding
作者: Hsu, Chih-Hao
Kuo, Shiao-Wei
Chen, Jem-Kun
Ko, Fu-Hsiang
Liao, Chun-Syong
Chang, Feng-Chih
材料科學與工程學系奈米科技碩博班
應用化學系
Graduate Program of Nanotechnology , Department of Materials Science and Engineering
Department of Applied Chemistry
公開日期: 5-Aug-2008
摘要: We have synthesized poly(methyl methacrylate-b-4-vinylpyridine) (PMMA-b-P4VP) and poly (styrene-r-vinylphenol) (PS-r-PVPh) copolymers by using anionic and free radical polymerizations, respectively. Well-defined micelles through hydrogen bonding have been prepared by mixing PMMA-b-P4VP diblock copolymer and PS-r-PVPh random copolymer in a single solvent. Block copolymers were mixed with random copolymers, with various [N]/[OH] ratios (4/1, 2/1, 1/1, and 1/4) in which "[N]/[OH]" represents the molar ratio of pyridine groups on P4VP to hydroxyl groups on PVPh. The presence distribution of PVPh/P4VP and PVPh/PMMA hydrogen bonding depends on the feeding ratio of PVPh to P4VP. When the PVPh content is lower than that of P4VP, hydrogen bonding occurs only between PVPh and P4VP; with excess PVPh, additional hydrogen bonding between PVPh and PMMA would occur. Furthermore, the effect of the solvent quality on the self-assembly behavior of PMMA-b-P4VP/PS-r-PVPh blends is investigated by considering tetrahydrofuran (THF) and dimethylformamide (DMF) as common solvents. We can mediate the strength of hydrogen bonding in blend systems by adopting different solvents and inducing different morphology transitions.
URI: http://dx.doi.org/10.1021/la703960g
http://hdl.handle.net/11536/8474
ISSN: 0743-7463
DOI: 10.1021/la703960g
期刊: LANGMUIR
Volume: 24
Issue: 15
起始頁: 7727
結束頁: 7734
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