Effect of Polymer Concentration and Solution pH

Polyacrylic Acid Molecular Weight (kDaltons) Symplex Characteristics 

CMC carboxymethylcellulose DADMAC polydiallyldimethylammoinum chloride C concentration of polymer (wt%) SOL soluble complex  

A comparison of Tables 9-12 indicates that naturally occurring species tend to produce stable membranes more abundantly. We believe this is due to the cyclic nature and rigidity of the backbone, as will be discussed in the following section of the paper. Several trends are immediately obvious. For example, the hydrophobicity of the polymer appears to be a critical parameter. While polyacrylic acid can form a stable membrane with virtually all polycations, poly-methacrylic acid is much less effective. Similarly, propylene glycol modified alginate is less effective than sodium alginate. Furthermore, when the poly- 

Polyanion Percentage of Polycations which yielded a Stable Membrane Percentage of Polycations which yielded a Weak Membrane 

Tabls 9. Percentage of polycations which yielded weak and stable membranes for various naturally occurring polyanions 

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