UNUSUAL STRUCTURE OF MICELLES OF ETHOXYLATED DIISONONYLPHENOL

A study is made of the relationship between the molecular structure of ethoxylated diisononylphenol (ODNP) (C9)2ArE(m) (m = 18, 20, 24) and the colloid-chemical properties of micellar iodine solutions. The chem ical composition of the substance, their degree of uniformity, and fea tures of the conformational structure were studied by the methods of g el-penetrant chromatography, NMR spectroscopy, mass spectrometry, and molecular mechanics. The colloid-chemical properties were studied by t he methods of low-angle x-ray scattering and photocorrelation spectros copy. It was found that a somewhat unusual two-layered micellar struct ure is formed as a result of features of the conformational structure of ODNP molecules. This structure consists of a dense internal hydroph obic layer of radius 1-1.2 nm, a transitional hydrophobic layer 2 nm t hick, and hydrophilic outer shell 4 nm thick. The overall radius of th e micelle is about 7 nm.