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| Tetrahydrosalen backboned gadolinium complex as initiator for the ring-opening polymerization of ε-caprolactone |
| Guang Ming Wu, Xu Feng Ni, Wei Lin Sun, Zhi Quan Shen |
| Key Laboratory of Macromolecule Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 31002Z China |
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Abstract Tetrahydrosalen ligand was employed in the synthesis of gadolinium complex. The ligand was deprotoned by LiBu, and the afforded lithium salt was reacted with anhydrous GdCl3 to produce the gadolinium complex through salt metathesis. This complex was successfully used to initiate the ring-opening polymerization of ε-caprolactone. The initiation conditions in different temperature, monomer-to-initiator ratio and time were investigated. Under the condition:[ε-caprolactone]:[catalyst]=600,56℃, toluene:2ml, poly(ε-caprolactone) (PCL) with Mw=11,2782 and PDI=1.96 was achieved.
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Received: 09 January 2008
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Corresponding Authors:
Wei Lin Sun, E-mail address:opl_sunwl@zju.edu.cn
E-mail: opl_sunwl@zju.edu.cn
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| About author:: 10.1016/j.cclet.2008.04.021 |
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