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Orientation- and cosolvent-induced self-assembly of amphiphilic homopolymers in selective solvents
Polymer ( IF 4.1 ) Pub Date : 2021-09-04 , DOI: 10.1016/j.polymer.2021.124160
Aleksandr I. Buglakov 1, 2 , Daniil E. Larin 1 , Valentina V. Vasilevskaya 1
Affiliation  

Self-assembly of single amphiphilic homopolymer in solvents with inverse selectivities, characterized by symmetric affinity and disgust to backbone and side groups, and their binary mixtures are studied by means of computer simulations and analytical theory, depending on composition and miscibility of components. In each of these two solvents separately, the polymer chain forms either multidomain or beads-on-a-string structures. Morphological contrast comes from the distinction in orientational mobility of side groups. In the backbone-selective solvent, the enhancing of orientational mobility of pendant groups due to merging of soluble shells of beads gives rise to a new type of attraction - orientation-induced attraction, which leads to close packing of intrachain micelles into the multidomain structure. In binary solvent the amphiphilic homopolymer manifests cosolvency behavior. At strong incompatibility of solvents variation of composition toward the equal concentrations of the solvents provokes series of morphological transitions, accompanied by gradual uptake of minor component of the solvent mixture into the assembly.



中文翻译:

定向和共溶剂诱导的两亲均聚物在选择性溶剂中的自组装

通过计算机模拟和分析理论,根据组分的组成和混溶性,在具有反向选择性的溶剂中自组装单个两亲性均聚物,其特征是对称亲和力和对骨架和侧基的厌恶,以及它们的二元混合物。在这两种溶剂的每一种中,聚合物链形成多域或串珠结构。形态对比来自侧群方向移动性的区别。在骨架选择性溶剂中,由于珠的可溶性壳的合并而增强了侧基的取向迁移率,产生了一种新型的吸引力——取向诱导的吸引力,这导致链内胶束紧密堆积到多域结构中。在二元溶剂中,两亲均聚物表现出共溶行为。在溶剂的强烈不相容性下,组成向相同浓度溶剂的变化引起一系列形态转变,伴随着溶剂混合物的微量组分逐渐吸收到组件中。

更新日期:2021-09-09
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