In this work, for the first time, zeolitic imidazolate frameworks (ZIFs=ZIF-8, ZIF-67, and Zn/Co-ZIF), obtained via spray drying, were used as heterogeneous catalysts for the ring opening polymerization of epsilon-Caprolactone without any co-catalyst or initiator. The catalytic activity of the spray dried ZIFs series varies in the order of Zn/Co-ZIF

Keywords:Ring-opening polymerization;Biodegradable polycaprolactone;Metal-organic frameworks;Zeolitic imidazole frameworks;Heterogeneous catalyst