| abstract |
Compounds of formula I: n nwherein X are independently —(CH 2 ) b —, wherein b is 0 or an integer from 1 to 6; R f are independently —CF 2 O(CF 2 CF 2 O) p (CF 2 ) q CF 2 —, —CF 2 CF 2 O(CF 2 CF 2 CF 2 O) r CF 2 CF 2 —, or —CF 2 CF 2 CF 2 O(CF 2 CF 2 CF 2 CF 2 O) s CF 2 CF 2 CF 2 —, or derivatives thereof, wherein p, q, r and s are independently integers so that M n of R f is about 150 to 4500; and Z are independently chosen from groups that comprise —OH, —(OH) 2 , —COOCH 3 , —F, —CF 3 , or —CF 2 CF 3 , with the caveat that not all Z are the same. |