Abstract
A novel biodegradable copolymer, poly(5,5-dibromomethyltrimethylene carbonate- co-ɛ-caprolactone) (poly(DBTC- co-CL)) with pendant bromine groups, was synthesized via ring-opening polymerization (ROP) of ɛ-caprolactone (CL) and 5,5-dibromomethyltrimethylene carbonate (DBTC) using stannous octoate (Sn(Oct) 2) as catalyst. Then the pendant bromine groups were completely converted into azide form, which permitted “click” reaction with alkyne-terminated polyethylene (A-PEG) by Huisgen 1,3-dipolar cycloadditions preparing biodegradable amphiphilic poly(DTC- co-CL)- g-PEG graft copolymer. The graft copolymer was characterized by nuclear magnetic resonance (NMR) and size-exclusion chromatography (SEC).
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