氧乙烯数对辛基苯酚聚氧乙烯醚表面扩张粘弹性质的影响

Effect of Oxyethylene Numbers on Surface Dilational Properties of Octylphenol Polyoxyethylene Ethers

研究了非离子表面活性剂辛基苯酚聚氧乙烯醚TX-100、TX-102和TX-165(平均氧乙烯数依次为10、12、16)水溶液的表面扩张粘弹性质,考察了氧乙烯数变化对表面吸附膜特性的影响.研究结果表明,随着氧乙烯数的增大,表面膜表现出较大的模量和较强的弹性.这是由于较长氧乙烯链在表面上的“平躺”产生较慢的弛豫过程造成的.

The surface dilafional viscoelasficifies of octylphenol polyoxyethylene ethers solutions, TX-100（10 oxyethylene （EO）, TX-102（12EO） and TX-165（16EO）, were investigated by Langmuir trough method. The influences of polyoxyethylene numbers on surface dilational properties were expounded. It showed that the increase of polyoxyethylene numbers resulted in the increase of surface dilational modulus and elasticity, which may be attributed to the slower relaxation processes caused by the ＂flat-configuration＂ of the longer polyoxyethylene chain at the surface.