Common types of nonionic surfactants

Fatty alcohols Fatty alcohol ethoxylates Alkylphenol ethoxylates Polyethylene glycol esters (ethoxylated fatty acids) 

Also fatty acid mono- and diesters of ethylene and propylene glycols, mono- and diglycerides and ethoxylated derivatives. 

In block copolymers the polypropylene block(s) constitute the hydrophobic part and the polyethylene block(s) the hydrophilic part. Random copolymers do not have identifiable hydrophobic or hydrophilic parts. 

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