Micellar structures of block-copolymers with ordered cores in dilute solution as studied by polarized and depolarized light scattering
Micellar structures of block-copolymers with ordered cores in dilute solution as studied by polarized and depolarized light scattering
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通过偏振和去偏振光散射研究稀溶液中具有有序核的嵌段共聚物的胶束结构
DOI：
10.1002/polb.21135
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发表时间：
2007-06
影响因子：
--
通讯作者：
Nose, Takuhei
中科院分区：
文献类型：
--
作者：
Iyoda, Tomokazu;Lin, Shaoliang;Lin, Jiaping;Nose, Takuhei
两亲性液晶嵌段共聚物的分级自组装行为（pEG m Az n），由聚聚（乙二醇）（PEG）嵌段和聚（乙二醇）（PEG）嵌段和聚（乙二醇）（PEG）嵌段的液晶聚合物嵌段（PAZ）（11-[4-（4-丁基苯基偶氮）苯氧基]-甲基丙烯酸十一烷基酯），其含有偶氮苯介晶，在对pEG嵌段有利的选择性溶剂二甘醇中，研究了偏振光和去偏振光散射。结果发现，这些共聚物可以形成胶束粒子的内部有序结构的光学各向异性。根据嵌段的相对长度，所获得的胶束结构显示出具有不同几何各向异性的光学各向异性。PAZ-核心嵌段的较高组成导致较大的聚集体。低分子量的共聚物倾向于形成细长的线，其显示出较大的尺寸和较大的聚集数。即使在pAz-core嵌段组成相似的情况下，不同链长的共聚物也可以形成具有不同分子取向的不同聚集结构的核。研究还发现，加入少量的表面活性剂，C12 E25，使绳状聚集体更短。
The hierarchical self-assembly behaviors of a series of amphiphilic liquid crystalline block copolymers (pEG m Az n ), consisting of poly(ethylene glycol) (pEG) block and liquid crystalline polymer block (pAz) of poly(11-[4-(4-butylphenylazo) phenoxy]-undecyl methacrylate) containing an azobenzenzene mesogen, in the selective solvent diethyleneglycol, which is good for pEG block, were studied by polarized and depolarized light scattering. It was found that these copolymers can form micellar particles with internal ordered structures of optical anisotropy. Depending on the relative lengths of the blocks, the obtained micellar structures show optical anisotropies with different geometrical anisotropies. The higher composition of pAz-core blocks leads to the larger aggregate. The lower-molecular-weight copolymers tend to form the long and thin strings, which show rather the larger size with larger aggregation number. Even at the similar composition of pAz-core block, copolymers with different chain lengths can form the core of the different aggregating structures with the different molecular orientations. It was also found that the addition of a small amount of the surfactant, C 12 E 25 , makes the string-like aggregate shorter.
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影响因子：
56.9
作者：
Li, ZB;Kesselman, E;Lodge, TP
通讯作者：
Lodge, TP
影响因子：
15
作者：
Myongsoo Lee;Byoung-Ki Cho;K. J. Ihn;Won-Ki Lee;Nam-Keun Oh;W. Zin
通讯作者：
Myongsoo Lee;Byoung-Ki Cho;K. J. Ihn;Won-Ki Lee;Nam-Keun Oh;W. Zin
影响因子：
5.5
作者：
Jin Wu;E. Pearce;T. Kwei;A. A. Lefebvre-A.;N. Balsara
通讯作者：
Jin Wu;E. Pearce;T. Kwei;A. A. Lefebvre-A.;N. Balsara
影响因子：
3.9
作者：
Lehner, D;Lindner, H;Glatter, O
通讯作者：
Glatter, O
影响因子：
56.9
作者：
Ikkala, O;ten Brinke, G
通讯作者：
ten Brinke, G