Journal of Chemical Sciences | |
Salicylaldimine Copper(II) complex catalyst: Pioneer for ring opening Polymerization of Lactide | |
NIBEDITA NATH1  ANITA ROUTARAY1  TUNGABIDYA MAHARANA22  JAYA PRAKASH DAS1  ALEKHA KUMAR SUTAR11  PRATAP KUMAR SAHOO3  | |
[1] Catalysis Research Lab, Department of Chemistry, Ravenshaw University, Cuttack, Odisha, 753 003, India$$;Department of Chemistry, National Institute of Technology, Raipur, 492 010, India$$;School of Physical Sciences, National Institute of Science Education and Research, Bhubaneswar, Odisha, 751 005, India$$ | |
关键词: Ring opening polymerization (ROP); Lactide; Salicylaldimine; copper complex; PLA.; | |
DOI : | |
来源: Indian Academy of Sciences | |
【 摘 要 】
Salicylaldimine copper complex has been synthesized and its reactivity for the ring-opening polymerization(ROP) of lactide has been studied. This monomeric copper complex was prepared by the reaction ofcopper(II) solution with one molar equivalent of salicylaldimine Schiff-base ligand in methanol under nitrogenatmosphere. This copper complex has been characterized by different spectroscopic methods, which showedsquare planar geometry. The molecular structure of the salicylaldimine Schiff-base has been determined byX-ray diffraction studies. The complex was tested as the initiator for the ring-opening polymerization of lactide,with variation in diamine group in ligand. The rate of polymerization is dependent on the diamine groupin the following order: ethylene > propylene > phenyl. The salicylaldimine copper complex allows controlledring-opening polymerization as indicated by the linear relationship between the percentage conversion and thenumber-average molecular weight. On the basis of literature reports, a mechanism for ROP of lactide has beenproposed.
【 授权许可】
Unknown
【 预 览 】
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