引用本文:
赵汉英, 雷中立, 宋法江, 黄葆同. 用激基缔合物荧光研究聚苯乙烯-聚甲基丙烯酸甲酯嵌段共聚物在溶液中的分子构型[J]. 应用化学,
1997, 14(2): 87-89.
Citation: Zhao Hanying, Lei Zhongli, Song Fajiang, Huang Baotong. Study on Molecular Configuration of Poly (Styrene b-methyl methacrylate) in Solution by Excimer Fluorescence Technique[J]. Chinese Journal of Applied Chemistry, 1997, 14(2): 87-89.
Citation: Zhao Hanying, Lei Zhongli, Song Fajiang, Huang Baotong. Study on Molecular Configuration of Poly (Styrene b-methyl methacrylate) in Solution by Excimer Fluorescence Technique[J]. Chinese Journal of Applied Chemistry, 1997, 14(2): 87-89.
用激基缔合物荧光研究聚苯乙烯-聚甲基丙烯酸甲酯嵌段共聚物在溶液中的分子构型
摘要:
聚苯乙烯在溶液中的激基缔合物荧光被发现以来一直引起人们的兴趣[1,2].
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关键词:
- 聚苯乙烯-聚甲基丙烯酸甲酯嵌段共聚物
- / 荧光
- / 激基缔合物
- / 胶束
English
Study on Molecular Configuration of Poly (Styrene b-methyl methacrylate) in Solution by Excimer Fluorescence Technique
Abstract:
Excimer fluorescence was used to probe the change of fluorescence intensity ratio of excimer/monomer chromophore IE/IM of poly(S-b-MMA) with concentration in THF solution. Three concentration regions are recognized in the range studied with respect to the values of IE/IM. In region Ⅰ, the values of IE/IM are independent of the concentration of the solution. In region Ⅱ, the IE/IM values increase with the increase of concentration. In region Ⅲ, the values of IE/IM almost keep constant. This phenomenon is attributed to the shrinkage of polymer coils and the entanglement of polymer chains at high concentration. The formation of micelles of the block copolymer in THF solution on addition of acetone was also studied. The change of IE/IM values indicates that the PS chains act as core and the PMMA chains as the corona.
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Key words:
- poly(styrene-b-methyl methacrylate)
- / fluorescence
- / excimer
- / micelle
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