The fiber of claim 13 wherein said Q is selected from the group consisting of --SO2 N(R')(CH2)k --, --(CH2)k --, --CON(R')(CH2)k -- and --(CH2)k SO2 N(R')(CH2)k --, where R' is hydrogen, a phenyl group or is a methyl or ethyl group and where each k is independently an integer from 1 to about 20.