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  • 02월 22일 15시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Liquid Chromatography of Random Copolymers with Tunable Monomer Sequence Distributions

등록일
2008년 2월 15일 17시 54분 32초
접수번호
1432
발표코드
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발표시간
금 11시 : 40분
발표형식
심포지엄
발표분야
Functional Soft Materials: Synthesis and ApplicationsⅡ
저자 및
공동저자
Chang Y. Ryu, Junwon Han, Byung Ho Jeon, James J. Semler, Young K. Jhon, Jan Genzer
Department of Chemistry, Rensselaer Polytechnic Institute, USA,
We demonstrate that high performance liquid chromatography (HPLC) in the interaction chromatography (IC) mode is capable of distinguishing among various comonomer sequences in random copolymers (RCPs). S series of poly(styrene-co-4-bromostyrene) (PBrxS), where x is the mole fraction of 4-BrS, RCPs have been prepared by brominating parent monodisperse polystyrene (PS). The distribution of S and 4-BrS segments in PBrxS was adjusted by varying the solvent quality for PS before the bromination reaction. We utilize both normal and reversed phase IC techniques to demonstrate that the adsorption-based retention of PBrxS RCPs is affected not only by their chemical composition, but also by the comonomer distribution in the RCP. Both IC techniques are mutually complementary; they provide information on the interplay between the macromolecular collapse and segment blockiness affected by the adsorption-based retention times in polymer HLPC.

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