Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems
Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems
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DOI：
10.1021/ma951800a
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发表时间：
1996-09
期刊：
影响因子：
5.5
通讯作者：
J. Ruokolainen;M. Torkkeli;R. Serimaa;S. Vahvaselka;M. Saariaho;G. Brinke;O. Ikkala;S. Vahvaselkä
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文献类型：
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作者：
J. Ruokolainen;M. Torkkeli;R. Serimaa;S. Vahvaselka;M. Saariaho;G. Brinke;O. Ikkala;S. Vahvaselkä
通过使用不同氢键强度的表面活性剂，确定了通过与表面活性剂络合而诱导柔性聚合物形成介晶结构的临界相互作用强度。必须满足两个基本要求：(I)关联必须足够强，否则结构就会解体。(Ii)极性−非极性排斥力必须足够强，才能诱导微相分离。如果不满足后一种要求，但缔合作用足够强，则在均相熔体状态下仍将出现特征的梳状聚合物状SAXS峰。为了在实验上解决这些问题，聚(4-乙烯基吡啶)(P4VP)与不同类型的氢键表面活性剂相结合：烷基芳香醇、烷基羧酸、烷基脂肪醇和烷基脂肪胺。FTIR、SAXS、WAXS和光学显微镜表明，1-十二烷基-3，4，5-三羟基苯甲酸酯等烷基芳香醇在...
The critical interaction strength to induce mesomorphic structures in flexible polymers by complexing with surfactants is determined by using surfactants with different hydrogen-bonding strengths. Two essential requirements have to be satisfied: (i) the association has to be strong enough, otherwise the structure dissociates. (ii) The polar−nonpolar repulsion has to be sufficiently strong to induce microphase separation. If the latter requirement is not satisfied, but the association is sufficiently strong, a characteristic comb polymer-like SAXS peak will still be present in the homogeneous melt state. To address these issues experimentally, poly(4-vinylpyridine) (P4VP) was combined with different classes of hydrogen-bonding surfactants: alkyl aromatic alcohols, alkyl carboxylic acids, alkyl aliphatic alcohols, and alkyl aliphatic amines. FTIR, SAXS, WAXS, and optical microscopy demonstrate that alkyl aromatic alcohols, such as 1-dodecyl 3,4,5-trihydroxybenzoate yield mesomorphic structures at not too ...