Synthesis and characterization of novel poly(aryl ether)s via nitro displacement reaction = 니트로 치환 반응을 이용한 새로운 방향족 에테르계 고분자의 합성과 물성에 관한 연구

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Two dinitro monomers with trufluoromethyl groups which activate the nitro leaving group at ortho position were synthesized. One is 3,3``-bis(trifluoromethyl)-4,4``-dinitrobiiphenyl(DNBP) and the other is 3,3``-bis(trifluoromethyl)-4,4``-dinitro phenylsulfone(DNPS). DNBP was prepared from 5-bromo-2-nitrobenzotrifluoride with copper powder via Ullmann coupling reaction. Novel poly(arylene oxide)s and poly (aryelene sulfide)s were prepared from DNBP and various aromatic diols and dithiols via nitro displacement reaction in mild condition. Some of the synthesized poly (arylene oxide)s and the poly(arylene sulfide)s showed high intrinsic viscosity and formed tough transparent film. They were stable up to 450℃. The doubly activated dinitro monomer(DNPS) was synthesized from 5-chloro-2-nitrobenzotrifluoride with 2 steps. Polymerization of DNPS with dihydroxy or dithiol comonomers produced poly (aryl ether sulfone)s and poly(aryl thioether sulfone)s with low molecular weigh.
Advisors
Kim, Sang-Youlresearcher김상율researcher
Description
한국과학기술원 : 화학과,
Publisher
한국과학기술원
Issue Date
1998
Identifier
135280/325007 / 000963519
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 화학과, 1998.2, [ vi, 82 p. ]

Keywords

Poly(phenylene sulfide); Poly(aryl ether); Nitro displacement; 삼플로로메칠; 방향족 에테르계 고분자; 니트로 치환; Trifluoromethyl

URI
http://hdl.handle.net/10203/31793
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=135280&flag=dissertation
Appears in Collection
CH-Theses_Master(석사논문)
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