Wydział Chemii

Adrian Kowaliński

Rafał Petrus

Katarzyna Chomiak

Tadeusz Lis

2025

Applied Organometallic Chemistry

39

e70017/1-e70017/22

10.1002/aoc.70017

Naukowa

Angielski

Artykuł

A series of heterometallic trinuclear aryloxides, [REZn₂(sal-Me)₄Cl₃(H₂O)] (Hsal-Me=methyl salicylate; RE^III=Y^III (3), Ho^III (4), Er^III (5)), or hexanuclear aryloxides, [RE₂Zn₄(μ₃-OH)₂(μ-OMe)₂(sal-Me)₆Cl₄] (RE^III=Y^III (6), Ho^III (7), Er^III (8)) were synthesized via the reaction of zinc precursors [Zn₄(sal-Me)₈ ] (1) or [Zn₄(μ₃-OMe)₂(sal-Me)₆ ] (2) with 2 equiv of rare earth chlorides (RECl₃ ). The catalytic activity of complexes 1–8 was evaluated in the ring-opening polymerization (ROP) of pentadecanolide (PDL) and hexadecanolide (HDL) to assess the effect of the initiator structure on the polymerization process and the physicochemical properties of the resulting polyesters. The obtained low molecular weight polypentadecanolides (PPDLs) and polyhexadecanolides (PHDLs) were investigated as modifying agents for commercial polylactide (PLLA) resin and used to prepare PLLA/PPDL or PLLA/PHDL blends. Blending PLLA with PPDL or PHDL broadens its cold crystallization exotherm, shifts the T_cc to higher temperatures, and hinders the growth of PLLA crystals, ultimately leading to reduced thermostability and faster degradation.

heterometallic aryloxides, macrocyclic lactones, polylactide blends, rare earth-zinc complexes, ring-opening polymerization (ROP)

http://dx.doi.org/10.1002/aoc.70017

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