Studies of structure and viscoelasticity of soft matter formed by non-covalent bonding and molecular dynamics at extremely high frequencies

Abstract

Structure and viscoelasticity were fully discussed for hybrid threadlike micelles formed between a cationic surfactant, cetyltrimethyl ammonium bromide, and a random copolymer of styrene and sodium p-styrene sulfonate in aqueous solution and supra-molecular polymers formed by low molar mass compounds such as N,N',N"- tris(3,7- dimethyloctyl)benzene-1,3,5-tricarboxamide in a nonpolar medium due to hydrogen bond formation between amide groups. Moreover, high frequency molecular dynamics, i.e. nano-rheology, of hydrated water molecules and polymer chains dissolved in water such as collagen model polypeptides were also discussed based on the results obtained by extremely high frequency dielectric relaxation measurements up to 50 GHz.