PREPARATION OF TEMPERATURE-SENSITIVE POLYMER PARTICLES HAVING DIFFERENT LOWER CRITICAL SOLUTION TEMPERATURES

Preparation of temperature-sensitive core-shell composite polymer part icles was carried out by seeded emulsion copolymerization of dimethyla minoethyl methacrylate and ethylene glycol dimethacrylate with submicr on-sized polystyrene seed particles as core. The lower critical soluti on temperature (LCST) of the core-shell composite was about 35 degrees C, while the LCST could be controlled toward higher or lower temperat ures by copolymerizing the shell layer with hydrophilic/hydrophobic vi nyl comonomer.