광산란을 이용한 수용액상에서의 스타이렌계 아이오노머의 회합거동

Abstract

Ion-containing polymers can be classified into two families: polyelectrolytes and ionomers. Ionomer are polymers having ionic groups along the relatively non-polar polymer backbone chains. In consideration of the hydrophilicity and the relative amounts, and the types of the ionic groups of the ionomers, one can expect that the ionomers either can or cannot be dissolved in aqueous solution. Since its hydrophobicity of the polymer main chain, the dissolution of the ionomer in water results in the formation of nanometer sized colloidal particles when the ionomer solution shows a homogeneous phase. At this point, it should be noted that the ionomer in a solvent of low polarity, the ionic groups of the ionomer form aggregates. This is due to electrostatic interactions between fixed ions attached to the polymer backbone chain directly or as pendent ionic groups and counter-ions that are excluded from the non-polar polymer matrix and solvent. This thesis consist of fore chapters. In the first chapter as an introduction sectin, the history and general characteristics of ionomers are presented. In the case of the second chapter, the sizes of colloidal particles in THF/water (1/99 v/v) of the sulfonated polystyrene copolymers containing 2.1, 5.1 and 9.4 mol% of either acidic or ionic repeat units were investigated. In the next chapter, The effects of the molecular weights (MWs) of sulfonated polystyrene copolymers on the colloidal particle sizes and the size distributions were determined using a dynamic light scattering.