Cyclic olefine copolymer (COC) which is an engineering plastic was tried to form a superhydrophobic surface by a phase separation process using solvent + non solvent mixtures. The cloud points of the COC + solvent + non-solvent mixtures were determined and evaluated by using Hansen 3-solubility parameter approach. It was determined that the amorphous COC polymer is not suitable to prepare a superhydrophobic surface when used alone. However, a superhdrophobic surface with a water contact angle of 158±2° was obtained when COC is mixed with crystalline polypropylene homopolymer. The water contact angle and surface morphology of the polymer coatings were examined.
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