The aliphatic fluorocarbon terminal portion can be represented by the formula --D--Rf --Rh, wherein D is selected from the group consisting of a covalent bond, ##STR1## where r and r' are independently integers of 1 to about 20, s is independently an integer of 1 to about 10 for each (Cs H2s O), t is an integer of 1 to about 6, and p is an integer of 0 to about 4; Rf is a linear or branched, perfl