Synthesis of transparent and soluble poly(amide-imide) containing trifluoromethyl groups = 트리플루오로메틸 작용기를 가진 투명한 용해성 폴리(아미드-이미드)의 합성

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Aromatic poly(amide-imide)s are high-performance polymers used in various fields owing to their outstanding chemical resistance, thermal and mechanical properties. In addition, various properties, such as thermal stability, optical properties, and thermal expansion characteristics, can be adjusted by modifying the structure from the design stage of monomers. However, their strong inter-chain interaction via a formation of charge transfer complex cause intensive coloration. Because of the same reason, it has low solubility to common organic solvents causing processing difficulties. These disadvantages can be overcome by introducing flexible linkages, bulky pendant groups into polymer backbone or using non-coplanar structures. Due to its twisted structure, -CF3 moiety is expected to reduce the chain packing of poly(amide-imide)s and to provide transparent, soluble poly(amide-imide)s. In this study, we designed a new amine monomer containing a trifluoromethyl group and a biphenyl group. A series of poly (amide-imide)s were synthesized using this new monomer. Through experiments, it was confirmed that the higher the proportion of trifluoromethyl group, the higher the thermal stability and the lower the thermal expansion coefficient.
Advisors
Kim, Sang Youlresearcher김상율researcher
Description
한국과학기술원 :화학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 화학과, 2018.8,[iv, 28 p. :]

Keywords

Poly(amide-imide)s▼atrifluoromethyl group▼abiphenyl group; 폴리(아미드-이미드)▼a트리플루오로메틸기▼a바이페닐기

URI
http://hdl.handle.net/10203/267327
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=828669&flag=dissertation
Appears in Collection
CH-Theses_Master(석사논문)
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