Degradable poly(ester-ether urethane)s derived of AB_2 miktoarm star copolymer poly(ethylene glycol-(ε-caprolactone)_2) diol: Synthesis,characterization and degradation

摘要

Four different miktoarm star copolymers poly(ethylene glycol-(ε-caprolactone)_2) diol [PEG-PCL_2] were obtained using α-diol-ω-methoxy poly(ethylene glycol) [MPEG-(OH)_2] as macroinitiator/chain transfer agent in the ring opening polymerization (ROP) of e-caprolactone (CL) catalyzed by tin(II) 2-ethylhexano-ate [Sn(0ct)_2]. PEG-PCL_2 and l,6-hexamethylene diisocyanate (HDI) were used as precursors of a new family of poly(ester-ether urethane)s PEUs. PEUs films were characterized by FT-IR, DSC, mechanical properties, water absorption, hydrolytic degradation and SEM.