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용매증발에 의해 유도되는 피롤 단량체의 중합에 의해 제조된 폴리피롤/폴리비닐아세테이트 블렌드의 전기전도도 특성에 관한 연구
Characteristics of Electric Conductivity of Polypyrrole/Poly(vinyl acetate) Blends Prepared by In-Situ Polymerization of Pyrrole Due to Solvent Evaporation

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Authors
이동규; 임광모; 차국헌; 이희우; 김진환
Issue Date
1997
Publisher
한국고분자학회 = The Polymer Society of Korea
Citation
Polymer(Korea), 21, 803 (1997)
Keywords
polypyrrole(PPy)poly(vinyl acetate)(PVAc)PPy/PVAc blend(s)electric conductivityphase separation
Abstract
전도성 고분자인 폴리피롤(PPy)과 열가소성 매트릭스 고분자인 폴리비닐아세테이트(PVAc)가 혼합된 블렌드 제조를 위하여 메탄올에 피를 단량체와 PVAc 및 산화제(FeCl3)와 환원제 (FeCl2)를 일정량 넣고 교반조에서 일정시간 교반한 후, 용액을 캐스팅하여 용매의 증발에 의하여 피롤 단량체의 중합이 유도된 PPy /PVAc 블렌드를 얻었다. 교반조 내의 피를 단량체 및 간화제의 양이 많아질수록 피롤 단량체의 중합은 빠르게 진행됨을 관찰하였으며, 교반조 내의 체류간(holding time)에 따라 PPy/PVAc 블렌드의 전기전도도가 변함을 확인하였다 또한 용액 내의 산화제와 환원제의 상대적인 양이 몰비로 5 : 1인 경우 전기전도도가 0.1 S/cm가지 강승하여 최적의 값을 보임을 관찰하였다. PPy/PVAc 블렌드 내의 피롤의 양 증가에 따른 전기전도도의 상승을 관찰하였고, FT-IR 스펙트럼으로부터 산화제의 농도변화와 공액길이의 변화가 전기전토도에 영향을 미침을 알았다. ; Polypyrrole (PPy)/poly(vinyl acetate) (PVAc) blends were Prepared by solution casting of pyrrole/PVAc with a given amount of oxidant(FeCl3) and reductant (FeCl2) in methanol. During the evaporation of methanol the cast blend films Induced in-situ polymerization of pyrrole and phase separation of PPy and PVAc at the same time. As the in-itial amount of oxidant and pyrrole in the mixture was increased we observed that the pyrrole polymerization proceeded faster and the electric conductivity of the resulting PPy/PVAc blends varied depending on the holding time in the stirred tank before casting. It was noted that there exists an optimum ratio between oxidant and reluctant at 5.1 molar ratio to obtain a blend with a high electric conductivity up to 0.1 S/cm. As the pyrrole content in the PPy/PVAc blends was increased, the increase in electric conductivity of the blend was observed It was also found from the FT-IR spectra that the variation In oxidant amount and conjugation length of PPy in the blend combined to affect the electric conductivity.
ISSN
0379-153X
http://www.polymer.or.kr/sub6/sub6_2.php?content=search&seq=7399
Language
Korean
URI
http://kiss.kstudy.com/search/detail_view.asp?key=44692

http://hdl.handle.net/10371/5902
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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