| 초록 |
Gradient and block copolymers have been synthesized by polymerization of hydrophilic 2-ethyl-2 oxazoline with hydrophobic 2-(4-octyloxyphenyl)-2-oxazoline (PEtOx-grad OctOPhOx and PEtOx-block-OctOPhOx). Poly(2-ethyl-2-oxazoline) polymers are water-soluble and biocompatible materials. Six different samples, PEtOx-grad-OctOPhOx 85/15, 62/38, 42/58, PEtOx-block-OctOPhOx 86/14, 69/31 and 55/45, have been synthesized. PEtOx-grad-OctOPhOx and PEtOx-block-OctOPhOx at the air-water interface by surface pressure (Π)-surface area (A) isotherm and Langmuir-Blodgett (LB) films of each copolymer characterized by atomic force microscope (AFM) were investigated. Surface pressure (Π)-surface area (A) isotherms show that each of copolymers has different limiting area according to the ratio between hydrophilic part and hydrophobic part. Also graphs of gradient copolymers and block copolymers show different morphologies despite similar ratios. |
