We describe the synthesis and associative behavior in water of a strictly alternating comblike amphiphilic polymer based on poly(ethylene glycol) (PEG). The polymer has a strictly alternating sequence of PEG blocks (Mw = 8000) of low polydispersity and hydrophobic 18 carbon-atom alkyl pendent chains. Three copolymers with Mw = 28 000, 68 000, and 113 000 were prepared. The associative behavior of the polymer of molecular weight 28 000 (on average about 3 PEG-CIS sequences per chain) in water was studied by static and dynamic light scattering, spectrofluorimetry, and viscosity measurements. The behavior resembles that of hydrophobically end capped (i.e., telechelic) PEO. Flowerlike micelles, each containing approximately 14 hydrophobes, are formed by the association of about four to five polymer chains.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry