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  • 08월 18일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Characterization of Thiol-terminated Polystyrene Synthesized by Anionic Polymerization

등록일
2011년 8월 1일 15시 44분 18초
접수번호
1282
발표코드
Ⅳ-POLY.P-64 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
고분자화학
저자 및
공동저자
오중석, 장태현
포항공과대학교 화학과, Korea

Thiol is a useful functional group due to its high affinity to heavy metal (Au, Ag, Hg, Pb). For example, thiol-terminated polymers can be used as surface modifier in gold nanoparticle (Au-NP) synthesis. In this work, thiol-terminated polystyrene (PS-SH) was prepared by anionic polymerization of styrene followed by the chain end functionalization via a reaction with propylene sulfide. As-synthesized PS-SH were characterized by size-exclusion chromatography (SEC), liquid chromatography at the critical condition (LCCC), interaction chromatography (IC) and matrix-assisted laser desorption/ionization time-of-flight mass spectroscopy (MALDI-TOF MS). The end-fuctionalization reaction was not quantitative. Homo-polystyrene and PS-SH with oligomeric propylene sulfide end group were always formed according to the MALDI-TOF MS analysis. In addition, coupled products via disulfide linkage were also observed. To understand the reaction mechanism leading to various by-products, PS-SH samples were synthesized at varying stochiometric ratios of polystyryl anions to propylene sulfide and characterized by chromatography and mass spectrometry. For chromatographic separation of PS-SH from other side-products, IC and LCCC were more effective since SEC separates polymers according to the size and is incapable of separating polymers according to the functionality.


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