0.01μm以上の平均孔を有する高分子多孔のキャラクタリゼ-ション法 (医用高分子特集号)
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概要
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A rigorous theory of estimating the pore size distribution of straight through cylindrically and trancated-conically porous membranes from mercury intrusion (MI) method and the combination method of bubble pressure and fluid permeability (BP) was proposed. According to the theory, the average pore size <I>r<SUB>i</SUB></I>, determined by a conventional method using the filtrating velocity of a solvent and the porosity <I>P</I><SUB>r</SUB>, is equal to (in the case of cylindrical pore) or is approximated by (in the case of conical pore) (<I>r</I><SUB>4</SUB>·<I>r</I><SUB>3</SUB>) <SUP>1/2</SUP>, where <I>r</I><SUB>i</SUB> (<I>i</I>=3 and 4) is defined by the relation: <BR><I>N</I> (<I>r</I>) is defined as that the number of the pores with radii ranging from <I>r</I> to <I>r</I>+d<I>r</I> per unit surface area of the membrane is expressed by <I>N</I> (<I>r</I>) d<I>r</I>. The average pore size <I>r</I><SUB>pp</SUB>, determined by MI method, is equal to (in tne case of cylindrical pore) or is approximated by (in the case of conical pore) <I>r</I><SUB>3</SUB>. The parameters such as <I>P</I><SUB>r</SUB>, <I>N</I> (<I>r</I>) and <I>r</I><SUB>i</SUB> (<I>i</I>=1-6) are evaluated by analyzing the data obtained by MI, BP and the scanning electron microscope (SEM) methods on the basis of the present theory for the three practical porous polymeric membranes: a cylindrically porous membrane made of polycarbonate, a cellulose acetate membrane whose <I>r</I><SUB>1</SUB> of the front side differs from that of the back side, and a membrane wich have pores of irregular shapes, and are made of mixture of cellulose nitrate and cellulose acetate.
- 公益社団法人 高分子学会の論文
公益社団法人 高分子学会 | 論文
- 情報の入口--高分子センサ-とトランスデュ-サ- (情報化社会と高分子)
- 高分子科学最近の進歩--メルトレオロジ-(伸長粘度)
- 高分子系の相分離--特にポリマ-ブレンドについて
- 導電性高分子の磁気緩和--NMRT-1〓1の周波数依存性
- 多機能性高分子の合成 (化学修飾による多機能性高分子)