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제114회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Aging Effect of Ultrahigh Molecular Weight Cationic Polyacrylamide Copolymer by Frit-inlet Asymmetrical Flow Field-Flow Fractionation-Multiangle Light Scattering

2014년 8월 28일 16시 41분 27초
ANAL.P-573 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 15일 (수요일) 16:00~19:00
저자 및
우소희, 문명희*
연세대학교 화학과, Korea
Polyacrylamide (PAM) is a polymer consisted of acrylamide monomer, which is highly reactive substrate in free radical polymerization and easily forms long-chain polymers. PAM is widely used in waste water treatment due to its ability to degrade by various pathways. During the degradation, molecular weight of PAM decreases and the length of the chain become shorter. Therefore, for the efficient use of PAM as a flocculant, study on molecular weight distribution and its change by degradation must be preceded. In general, synthesized polymers have a wide molecular weight distribution. Size-exclusion chromatography (SEC) is one of the most common method but it has a limited molecular weight range of separating the sample. As frit inlet asymmetrical flow field-flow fractionation (FIAF4) has no stationary phase, pressure induced on samples is minimized and sample can be separated in its intact forms. Therefore, frit-inlet FFF system can be considered as suitable method for synthesized polymers with a broad molecular weight distribution. For this reason, FIAF4 was utilized to separate cationic PAM copolymer and their absolute molecular weight was measured by multiangle light scattering (MALS). PAM samples analyzed in this research were synthesized in different time periods. Since the aged polymer experienced longer degradation process than the newly synthesized polymer, aging effect was confirmed by the change in MWD using FIAF4-MALS.