Ogiwara Hibiki, Ishiwari Fumitaka, Kimura Tadahiro, Yamashita Yukihiro, Kajitani Takashi, Sugimoto Atsuki, Tokita Masatoshi, Takata Masaki, Fukushima Takanori
Laboratory for Chemistry and Life Science, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta 4259, Midori-ku, Yokohama 226-8503, Japan.
RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan and Materials Analysis Division, Open Facility Center, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan.
Chem Commun (Camb). 2021 Apr 25;57(32):3901-3904. doi: 10.1039/d1cc01092a. Epub 2021 Mar 23.
The chemical structure of a branch point of star-shaped polymers has been considered to have a small influence on the physical properties of the entire polymer. Contrary to this general notion, here we show that a 3-arm star polymer, composed of three poly(δ-valerolactone) arms extended from one side of a triptycene branch point, exhibits a remarkably high complex viscosity, compared to the analogous star-shaped polymers with a branch point of a triptycene isomer or triphenylethane.
星形聚合物支化点的化学结构一直被认为对整个聚合物的物理性质影响较小。与这一普遍观念相反，我们在此表明，一种由三个从三蝶烯支化点一侧延伸的聚（δ-戊内酯）臂组成的三臂星形聚合物，与具有三蝶烯异构体或三苯乙烷支化点的类似星形聚合物相比，表现出极高的复数粘度。
