ABSTRACT
Thus, xR6A-yAA, which has several shorter alkyl chains, and xR8(Eh)AyAA, which has several branched alkyl chains, are considered to be adsorbed at the air-water interface with wide occupied areas and to orient themselves so as to cause effective surface activities due to a good balance between hydrophobic and hydrophilic groups. xR 12A-yAA, which has longer multialkyl chains, is considered to be packed so densely at the airwater interface that it gives rise to the poor surface activities. The presence of aromatic nucleuses in the hydrophobic group renders the cotelomers less surface-active due to their bulky structures.
