|
|
| Type |
Oral Presentation |
| Area |
Oral Presentation of Young Analytical Chemists Ⅰ |
| Room No. |
303호 |
| Time |
THU 09:52-: |
| Code |
ANAL1.O-19 |
| Subject |
Effect of cationic monomer composition on polymerization of cationic polyacrylamide copolymers using frit-inlet asymmetrical flow field-flow fractionation with multi-angle light scattering |
| Authors |
이혜진, 문명희1,*
연세대학교 분리분석연구실/화학과, Korea
1연세대학교 화학과, Korea
|
| Abstract |
Cationic polyacrylamide (CPAM) copolymers are often used as flocculants in wastewater treatment and they have high molecular weight distribution (~108 g/mol) and viscosity. Physicochemical properties of CPAM depend on polymerization methods (solution polymerization and emulsion polymerization), chain types (linear and branched), cationic monomer composition, and amount of cross-linking agent. In this study, influence of these factors on molecular weight distribution and conformation of CPAM copolymers was evaluated using an elution-based separation technique, flow field-flow fractionation (FlFFF), and multi-angle light scattering- differential refractive index (MALS-DRI).
In terms of cationic monomer composition, CPAM tended to become more compact with increased molecular weight distribution when cationic monomer composition was increased in solution polymerization and in emulsion polymerization, CPAM seemed to be aggregated when cationic monomer composition was less than 10 mol%. When the amount of cross-linking agent was increased, CPAM tended to be synthesized smaller and more compactly. Also, FlFFF is operated in either normal or steric/hyperlayer mode depending on the size of sample particles and in this study, a transition between two different modes of separation was observed under gradient elution.
|
| E-mail |
hyejin270@yonsei.ac.kr |
|
119th General Meeting of the KCS