Nickel(II) complex catalyzed ring-opening polymerization of lactide

被引：13

作者：

Routaray, Anita ^{[1
]}

Mantri, Somanath ^{[1
]}

Nath, Nibedita ^{[1
]}

Sutar, Alekha Kumar ^{[1
]}

Maharana, Tungabidya ^{[2
]}

机构：

[1] Ravenshaw Univ, Dept Chem, Catalysis Res Lab, Cuttack 3, Odisha, India

[2] Natl Inst Technol, Dept Chem, Raipur, Madhya Pradesh, India

来源：

POLYHEDRON | 2016年 / 119卷

关键词：

Ring opening polymerization; Lactide; Schiff base; Nickel complex; PLA; CYCLIC ESTERS; STRUCTURAL-CHARACTERIZATION; EPSILON-CAPROLACTONE; ALUMINUM COMPLEXES; EFFICIENT CATALYST; METAL-COMPLEXES; LIGANDS; MAGNESIUM; ROP; BIS(PHENOLATE);

D O I：

10.1016/j.poly.2016.08.032

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The present manuscript is focused on the synthesis of a series of nickel complexes [Ni-HMBED, Ni-HMBPD and Ni-HMBBD] based on Salen-type Schiff-base ligands and a study of their reactivity for the ring-opening polymerization (ROP) of lactide. These nickel complexes were prepared by the reactions of a nickel solution with one molar equivalent of the Salen-type Schiff-base ligands in methanol under a nitrogen atmosphere. Characterization of these nickel complexes have been carried out by different analytical techniques, which showed a square planar geometry for the Ni atom. The nickel complexes have shown high activity towards the ring-opening polymerization of lactide, with variation in the diamine group. The linear relationship established between the percentage conversion and the number average molecular weight has confirmed the controlled ROP by the use of the nickel complexes as a catalyst. Finally, a mechanism for the ROP of lactide has been proposed. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：335 / 341

页数：7

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