Zirconium (IV) Acetylacetonate: Ring-Opening Initiator Mediating One-Step Synthesis of Biodegradable Polyacids

Table 1

Conversion of monomers and product characterization of MTCOOH/LA/[Zr(acac)₄] (300/700/1) copolymerization carried out in bulk at 120°C.

Entry	Time	MTC-COOH conversion	LA conversion	Product; composition; MTC-COOH/LA	x 10^−3	x 10^−3
1.	2.25	12	8	40 / 60	1.0	1.3	1.3
2.	24	68	66	40 / 60	3.4	5.0	1.5
3.	48	96	94	39 / 61	4.2	8.0	1.9
4.	-	-	-	39 / 61	10	21	2.1

indicates polymer precipitated from its chloroform solution into cold diethyl ether.