Interactions between Poly(N-vinylformamide) and Sodium Dodecyl Sulfate Studied by Gel Permeation Chromatography with Online Multi-Angle Light Scattering

• Main Authors: Yu-ChaoKao, 高于超
• Other Authors: Sheng-Shu Hou
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/84202625719611700176

碩士 === 國立成功大學 === 化學工程學系碩博士班 === 100 === The novel method to characterize the polymer-surfactant interaction is using gel permeation chromatography with online multi-angle laser light scattering, differential refractometer, and UV/Visible detector. In this study, the interaction between poly(N-vinylformamide) (PNVF) and sodium dodecyl sulfate (SDS) under several SDS concentrations has been investigated by using this technique to confirm the influence of SDS bound into the PNVF/SDS complex on the molecular shapes of PNVF. The application of both Hummel-Dreyer method and multi-component light scattering principle provides much useful information concerning the determinations of the binding ratio (the amount of SDS bound to PNVF), the z-average radius of gyration of PNVF/SDS complexes (Rz), and the molecular mass of PNVF/SDS complexes (Mw,PS) and the PNVF itself within the PNVF/SDS complexes (Mw,P). From the measurements of the molecular mass of PNVF in the PNVF/SDS complexes at different SDS concentrations, the results show that the Mw,P increasing with increasing SDS concentrations between cac and cmc. It indicates that a significant intermolecular association between cac and cmc in PNVF/SDS system, even when the PNVF concentration below the critical overlap concentration (c*).