Polymers of ε-Caprolactone Using New Copper(II) and Zinc(II) Complexes as Initiators: Synthesis, Characterization and X-Ray Crystal Structures

被引：12

作者：

Posada, Andres F. ^{[1
]}

Macias, Mario A. ^{[1
]}

Movilla, Santiago ^{[1
]}

Pietro Miscione, Gian ^{[1
]}

Perez, Leon D. ^{[2
]}

Hurtado, John J. ^{[1
]}

机构：

[1] Univ Andes, Dept Quim, Carrera 1 18A-12, Bogota 111711, Colombia

[2] Univ Nacl Colombia, Grp Macromol, Dept Quim, Carrera 45 26-85,Edificio 451 449, Bogota 11001, Colombia

来源：

POLYMERS | 2018年 / 10卷 / 11期

关键词：

ring-opening polymerization; epsilon-caprolactone; bis(3,5-dimethylpyrazole) ligands; zinc(II) and copper(II) complexes; crystal structures; RING-OPENING POLYMERIZATION; CHROMIUM(III) COMPLEXES; EFFICIENT INITIATORS; LIGANDS SYNTHESIS; CU(II) COMPLEXES; BEARING; BLENDS;

D O I：

10.3390/polym10111239

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Five of six new Zn(II) and Cu(II) complexes were active in the ring-opening polymerization (ROP) of epsilon-caprolactone (CL) under solvent-free conditions, producing polycaprolactones (PCLs) of high crystallinity with molecular weights between 22,900 and 38,700 g mol(-1) and decomposition temperatures above 260 degrees C. H-1 NMR analysis demonstrated that the PCLs obtained were mainly linear, having hydroxymethylene groups at the chain ends. The results obtained indicated a significant improvement in terms of the ratio of monomer: initiator compared to related Cu(II) and Zn(II) complexes. In addition, the structures of the complexes 1 and 4 were determined by single-crystal X-ray diffraction. The synthesis and full characterization of all complexes are described in this paper.

引用

页数：14

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