Solution assembly behaviors of poly(3-hexylthiophene)-graft-poly(2-vinylpyridine) rod-coil copolymer분자량과 접합 밀도가 조절된 P3HT-P2VP 접합 공중합체의 용액내 자가 조립 거동 연구

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Solution assembly of conjugated polymer based block copolymers (BCPs) is an attractive approach for achieving conducting nanowires (NWs) with nanometer-scale cross-sectional dimensions. In particular, conjugated block offers one-dimensional self-growth of crystalline NWs, and secondary block gives rise to stable dispersion of NWs and additional tuning parameter for the structures of NWs. Herein, we developed a series of poly(3-hexylthiophene)-graft-poly(2-vinylpyridine) (P3HT-g-P2VP) rod-coil copolymers with systematically controlled crystallinity by modifying both grafting density and molecular weight (Mn) of coil block, and their solution assembly behaviors were carefully examined. As increasing the volume fraction and grafting density of the secondary blocks, melting temperatures, crystallization temperatures, and the crystallinity were gradually decreased by hindering rod-rod interaction between P3HT backbones, resulting in the formation of short NWs. Furthermore, the length of NWs was relatively shorter for the densely grafted copolymer despite same volume fraction of secondary block. These results suggested that controlling Mn and the number of branched coil block was critical to regulate the crystalline properties and new approach for determining the NWs growth.
Advisors
Kim, Bum Joonresearcher김범준researcher
Description
한국과학기술원 :생명화학공학과,
Publisher
한국과학기술원
Issue Date
2016
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2016.2 ,[iv, 49 p. :]

Keywords

Conjugated polymer; Poly(3-hexylthiophene); poly(2-vinylpyridine); graft copolymer; solution assembly; 전도성 고분자; 접합 공중합체; 결정성; 용액내 자가조립; 전도성 나노섬유

URI
http://hdl.handle.net/10203/221480
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=649475&flag=dissertation
Appears in Collection
CBE-Theses_Master(석사논문)
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