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Contact angle vs surface energy

Contact angle vs surface energy

Contact angle vs surface energy

(OP)
Dear all,

        I am using a polymer thin film which shows a high contact angle, high surface energy when i took a XPS spectrum it shows a low F:C ratio which means the high contact angle might be contributed from the roughness. But still i couldnt correlate how could the surface energy be high which is calculated from contact angle data of water,diiodomethane and ethanol.

Anyone has any idea?

Thanks

Arun

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