formula CnF2n+1CmH2m??? where n and m range from 1 to about 10, Y is CH3??? and R1 is an alkyl group having from 3 to about 10 carbon atoms; RF is a partially fluorinated tail group of formula CnF2n+1CmH2m??? where n and m range from 1 to about 10, Y is C3H7??? and R1 is an alkyl group having from 3 to about 10 carbon atoms; RF is a partially fluorinated tail group of formula CnF2n+1CmH2m??? where