How do I decrease the hydrophobicity of polythiophene acetic acid synthesised by chemical oxidative polymerisation with FeCl3?

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Petra Skalková

Try to attach some hydrophobic groups to its OH groups

Bhuman Gangopadhyay

Petra Skalková , how do I do that? also I want to sustain the conductivity of the polymer.

Yuri Mirgorod

If you need to reduce the hydrophobicity of a polymer molecule, then you need to ionize the carboxyl group, for example, neutralize it with a lithium ion. If you want to increase the solubility of the polymer in water, then you need to use salting agents: urea, thiourea, guanidinium chloride...