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Intermediate Segregation Type Chain Length Dependence of the Long Period of Lamellar Microdomain Structures of Supramolecular Comb-Coil Diblocks

机译:超分子梳状线圈二嵌段的层状微区结构长周期的中间偏析型链长依赖性

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摘要

A characteristic intermediate segregation type chain length dependence of the long period D of the lamellar microdomain structure of a class of comb-coil supramolecules is reported. The supramolecular comb-coil diblock copolymers studied consist of a polystyrene (PS) “coil” block and a “comb” block of poly(4-vinylpyridine) (P4VP) either hydrogen bonded to pentadecyl phenol (PDP) (i.e., P4VP(PDP)-b-PS) or first protonated with methanesulfonic acid (MSA) and then hydrogen bonded to PDP (i.e., P4VP(MSA)(PDP)-b-PS). In both cases we find a scaling D ~ Ntotδ, δ ≈ 0.8, where Ntot denotes the total number of monomers of the P4VP-b-PS backbone. In the case of diblock copolymers this would correspond to a characteristic intermediate segregation regime behavior. Pure PS-b-P4VP, on the other hand, shows the expected strong segregation behavior D ~ Ntotδ, δ ≈ 0.7.
机译:据报道,一类梳状线圈超分子的层状微区结构的长周期D具有特征性的中间偏析型链长依赖性。研究的超分子梳状-线圈二嵌段共聚物由聚苯乙烯(PS)的“线圈”嵌段和聚(4-乙烯基吡啶)(P4VP)的“梳状”嵌段组成,氢键联到十五烷基苯酚(PDP)(即,P4VP(PDP) )-b-PS)或首先用甲磺酸(MSA)质子化,然后氢键合到PDP(即P4VP(MSA)(PDP)-b-PS)上。在这两种情况下,我们都发现缩放比例为D〜Ntotδ,δ≈0.8,其中Ntot表示P4VP-b-PS主链的单体总数。在二嵌段共聚物的情况下,这将对应于特征性的中间偏析状态行为。另一方面,纯PS-b-P4VP显示出预期的强偏析行为D〜Ntotδ,δ≈0.7。

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