荧光标记法研究双嵌段共聚物的胶束化行为  

STUDIES ON THE MICELLIZATION OF A DIBLOCK COPOLYMER BY FLUORESCENCE LABELS

作　　者：李贺先[1] 孔林[1] 胡月晗[1] 

机构地区：[1]功能高分子材料教育部重点实验室,南开大学高分子化学研究所,天津300071

出　　处：《离子交换与吸附》2010年第2期121-125,共5页Ion Exchange and Adsorption

基　　金：国家自然科学基金(20774053;20974056);天津市自然科学基金(03380261)

摘　　要：结合Forster能量转移和芳香分子极性标尺技术,研究了两端分别标记芴和芘基团、具有不相容双嵌段的共聚物(Fl-PMMA400-b-PAA80-Py)的胶束化行为。结果表明,在临界胶束浓度以下,较长的PMMA链段首先形成寡链聚集体,这一现象反映了具有不相容双嵌段的共聚物胶束化特征;此外,本文首次发现芴基团荧光对其微环境极性较为敏感。The micellization of a diblock copolymer, FL-PMMA400-b-PAA80-Py consisting of two immiscible blocks separately labeled at the two ends with fluorene and pyrene groups was studied by combination of Foster energy transfer and fluorescence polarity scale of the both aromatic labels. The results show that below the CMC, some pauci-chain aggregates are first formed, reflecting the micellization feature of the diblock copolymers with two immiscible blocks. Meanwhile, the fluorene group was found for the first time to be also very sensitive to its micropolarity.

关 键 词：芳香分子极性标尺 双嵌段共聚物 胶束化 

分 类 号：O63[理学—高分子化学]