Polycaprolactone

PCL is a biodegradable polyester with a low melting point of around 60 C and a glass transition temperature of about 260C. PCL is prepared by ring opening polymerization of ε-caprolactone using a catalyst such as stannous octanoate. 

PCL is degraded by hydrolysis of its ester linkages under physiological conditions (such as in the human body) and has therefore received a great deal of attention for use as an implantable biomaterial. In particular it is especially interesting for the preparation of long-term implantable devices. A variety of drugs have been encapsulated within PCL beads for controlled release and targeted drug delivery. PCL is often mixed with starch to obtain a good biodegradable material at a low price. 

Applications and uses: The mix of PCL and starch has been successfully used for making trash bags.

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