Synthesis of Liquid-Crystalline Polymers by ring-opening polymerization and Formation of Liquid-Crystalline Complexes

2015 Fiscal Year Final Research Report

• Project/Area Number: 24550137
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Polymer chemistry
• Research Institution: Oita University
• Principal Investigator: Ujiie Seiji 大分大学, 工学部, 教授 (40185004)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: 開環反応 / 高分子合成 / 高分子液晶 / オキサゾリン / アジリジン / エポキシ

Outline of Final Research Achievements

Mesogenic monomers and side-chain polymers with reactive groups such as oxazoline, aziridine, and epoxy groups were synthesized. Various liquid-crystalline polymers were obtained using the ring-opening reaction. The side-chain polymers with oxazolylbiphenyl groups exhibited liquid-crystalline phases on heating and cooling processes. A side-chain polymer having oxazolylphenyl groups easily reacted with sebacic acid at the liquid state. The resultant polymers, which are a cross-linked polymer, formed a nematic phase. A polymer (Poxa-1), in which an oxazolyl group directly linked to the polymer backbone, was synthesized. Novel liquid-crystalline blocked copolymers were obtained by the reaction of Poxa-1 and a liquid-crystalline polymethacrylate with a carboxyl group at the terminal. The ring-opening reactions led to the development of the novel liquid-crystalline polymeric systems.

Free Research Field

高分子化学