121st General Meeting of the KCS

Type Poster Presentation
Area Polymer Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code POLY.P-17
Subject Hydrothermal Polymerization of Morphology Tunable Polyimide Microparticles
Authors Taehyung Kim, Byeong-Su Kim1,*
Department of Energy Engineering, Ulsan National Institute of Science and Technology, Korea
1Department of Chemistry, Ulsan National Institute of Science and Technology, Korea
Abstract Polyimide is one of the most important high-performance polymers and widely used in various fields due to its excellent mechanical performance and thermal stability. Unlike conventional synthetic approach, hydrothermal polymerization enables the synthesis of polyimide without using toxic solvents and catalysts. In this study, we report the synthesis of polyimide microparticles (PIMs) through hydrothermal polymerization with three isomers of phenylene diamine (PDA) and mellitic acid (MA). We found that the three structural isomers of PDA afforded the fine control over the morphology of PIMs with varying dimension. To explain the morphology difference with the type of PDA precursor, we analyzed chemical composition of PIMs. The fraction of amide to imide bond varies in each PIMs. Although we synthesize PIMs with precursors that have same element moieties, we also can control chemical composition of PIMs not only morphology by changing angle between two amines in PDA. Furthermore, the population of the polar group is reduced during the condensation reaction, resulting in phase separation. Based on this difference in chemical composition, we suggest the mechanism that explain morphology difference with bond rotation possibility during phase separation.
E-mail cote@unist.ac.kr