A novel biodegradable and thermosensitive microgel particle was prepared via suspension polymerization of a well-designed biodegradable macromonomer. The macromonomer is composed of amphiphilic block copolymer PEO-PPO-PEO, oligo(ester) and acryloyl end groups. Ammonium persulfate was employed as the initiator and N,N,N′,N′-tetramethylethylene-diamine as the accelerator. The resultant hydrogel particles were confirmed to be reversely thermosensitive as well as biodegradable.
