Star-Shaped Polymers with Helical Polyacetylene Arms. Comparison of Solution- and Solid-State Properties with Linear Helical Polyacetylenes

IF 5.1 1区化学 Q1 POLYMER SCIENCE Macromolecules Pub Date : 2024-11-05 DOI:10.1021/acs.macromol.4c01509

Shota Mino, Kosuke Matsui, Masahide Goto, Akiyuki Ryoki, Takeyuki Suzuki, Kazushi Fujimoto, Hiromitsu Sogawa, Hiroto Kudo, Fumio Sanda

引用次数: 0

Abstract

Star-shaped polymers have attracted attention due to their unique solution properties and viscosities. These effects are attributed to their hydrodynamic radii that differ significantly from those of linear polymers. The present study reports the synthesis of star-shaped helical polyacetylenes substituted with l-valine- and l-threonine-based optically active groups. The formation of star-shaped polymers was confirmed by size exclusion chromatography, solution viscosity, dynamic light scattering, and small-angle X-ray scattering measurements. The chiroptical intensities of the star-shaped polymers tended to be smaller than those of the corresponding linear polymers in solution but larger in the film state. The water contact angles and refractive indices of the star-shaped polymers were smaller than those of the linear polymers.

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具有螺旋状聚乙炔臂的星形聚合物。与线性螺旋聚乙炔的溶态和固态特性比较

星形聚合物因其独特的溶液特性和粘度而备受关注。这些影响归因于它们的流体力学半径与线性聚合物有很大不同。本研究报告了用基于 l-缬氨酸和 l-苏氨酸的光学活性基团取代的星形螺旋聚乙炔的合成。通过尺寸排阻色谱法、溶液粘度、动态光散射和小角 X 射线散射测量，证实了星形聚合物的形成。星形聚合物的光强度在溶液中往往小于相应线性聚合物的光强度，但在薄膜状态下则较大。星形聚合物的水接触角和折射率均小于线形聚合物。

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来源期刊

Macromolecules 工程技术-高分子科学

CiteScore

9.30

自引率

16.40%

发文量

942

审稿时长

2 months

期刊介绍： Macromolecules publishes original, fundamental, and impactful research on all aspects of polymer science. Topics of interest include synthesis (e.g., controlled polymerizations, polymerization catalysis, post polymerization modification, new monomer structures and polymer architectures, and polymerization mechanisms/kinetics analysis); phase behavior, thermodynamics, dynamic, and ordering/disordering phenomena (e.g., self-assembly, gelation, crystallization, solution/melt/solid-state characteristics); structure and properties (e.g., mechanical and rheological properties, surface/interfacial characteristics, electronic and transport properties); new state of the art characterization (e.g., spectroscopy, scattering, microscopy, rheology), simulation (e.g., Monte Carlo, molecular dynamics, multi-scale/coarse-grained modeling), and theoretical methods. Renewable/sustainable polymers, polymer networks, responsive polymers, electro-, magneto- and opto-active macromolecules, inorganic polymers, charge-transporting polymers (ion-containing, semiconducting, and conducting), nanostructured polymers, and polymer composites are also of interest. Typical papers published in Macromolecules showcase important and innovative concepts, experimental methods/observations, and theoretical/computational approaches that demonstrate a fundamental advance in the understanding of polymers.