General Use of Charge Types

Differences in the nature of the hydrophobic groups are usually less pronounced than those in the nature of the hydrophilic group. Generally, they are long-chain hydrocarbon residues. However, they include such different structures as  

Alkylnaphthalene residues (C3 and greater-length alkyl groups) 

High-molecular-weight propylene oxide polymers (polyoxypropylene glycol 

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