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

Table 2

MTC-COOH/LA copolymers obtained in zirconium-complex-catalysed (monomers/[Zr(acac)₄] 1000/1) bulk polymerization carried out at 130°C.

Entry	Monomer composition; MTC-COOH/ LA	Time	Conversion	Polymer; composition; MTC-COOH/ LA	x 10^−3	x 10^−3
1.	100:0	3	40	100:0	n/d
2.	70:30	24	95	72:28	n/d
3.	50:50	24	95	57:43	7	16	2.3
4.	30:70	24	95	31:69	12	25	2.1
5.	0:100	48	100	0:100	110	230	2.1

Determined with ¹H NMR technique; determined with SEC technique; not determined, material insoluble, or only partially soluble in CHCl₃.