otal of about 12 to about 15 carbon atoms and which does not contain a beta-alkoxy substituent or other moieties or linkages which significantly interfere with the performance of the surfactant for its intended purpose; X is hydrogen or the residue of a hydrophobic end-cap; Y is hydrogen, methyl, ethyl, or mixtures thereof; Z is hydrogen, methyl, or ethyl; m is 0 or 1; and n is an integer of 1 to