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Synthesis of Almost Fully Quavternized Poly(4-vinylpyridine)s by Polymer Reaction and Aggregation Property with Sodium Dodecyl Sulfate  

Sim, Hoo-Sik (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Choi, E-Joon (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Kim, Young-Chul (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Park, Il-Hyun (Department of Polymer Science and Engineering, Kumoh National Institute of Technology)
Publication Information
Polymer(Korea) / v.30, no.6, 2006 , pp. 556-562 More about this Journal
Abstract
Quarternized poly(4-vinyl pyridine)s have been prepared by the reaction of poly (4-vinyl pyridine)s (Mw=50 kg/mol and 200 kg/mol) and alkylating agents varying the carbon numbers of the alkyl groups (m):dimethyl sulfate (m=1) as well as bromoalkane (m= 5, 8, 12, 16, and 22) was used as an alkylating agent. The degree of alkylation was determined by using an elemental analysis and NMR spectroscopy. As a result, polyelectrolytes were obtained by the almost full alkylation of poly (4-vinyl pyridine)s. The critical aggregation concentration (CAC) was determined by measuring the change of turbidity occurred by addition of sodium dodecyl sulfate (SDS) into aqueous solution of quarternized poly-(4-vinyl pyridine)s, and the dependence of molecular weight of polymer, the length of N-alkyl group and concentration of NaCl upon CAC was investigated. As a result, as the molecular weight or the length of alkyl group was increased, less amount of SDS Gould induce the aggregation.
Keywords
fully quarternized poly(4-vinyl pridine); critical aggregation concentration; polyelectrolyte; turbidity; sodium dodecyl sulfate;
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