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Polymer Bulletin
Published in: Polymer Bulletin 5/2012

01-09-2012 | Original Paper

The novel [(dME)2(HIM)P]2Ti(IV) complex: synthesize, characterization, and its utility in ROP of d,l-lactide

Authors: Chengbo Hu, Yuanliang Wang, Ya Fu, Jiaoxia Sun, Moyuan Deng, Xiongzhao Xiang

Published in: Polymer Bulletin | Issue 5/2012

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Abstract

The novel {2,4-bis(1,1-dimethylethyl)-6-{[(2-hydroxyethyl)imino]methyl}phenoxy}2 titanium(IV) complex {[(dME)2(HIM)P]2Ti(IV)} had been synthesized and characterized by EA, XRF, IR, and NMR methods. The [(dME)2(HIM)P]2Ti(IV) complex was reactive and promoted ring-opening polymerization (ROP) of d,l-lactide in the presence of benzyl alcohol (BnOH). And the results showed that ROP of d,l-lactide were produced upon addition of an excess (1–8 equiv.) of external BnOH. The complex showed a living and controlled fashion (M w/M n = 1.15–1.32) for ROP of d,l-lactide and could produce the poly(d,l-lactide) with average molecular weight (M n) up to 8.87 × 104 g mol−1. The mechanism study by 1H NMR spectrum of poly(d,l-lactide) with terminal benzyl ester group and [(dME)2(HIM)P]2Ti(IV) complex revealed that the polymerization proceeded through the traditional activated monomer mechanism and the acyl-oxygen bond cleavage mode of monomer. And the 13C NMR spectra and TG/DSC analysis showed that poly(d,l-lactide) was essential atactic and thermal stable polymer.
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Metadata
Title
The novel [(dME)2(HIM)P]2Ti(IV) complex: synthesize, characterization, and its utility in ROP of d,l-lactide
Authors
Chengbo Hu
Yuanliang Wang
Ya Fu
Jiaoxia Sun
Moyuan Deng
Xiongzhao Xiang
Publication date
01-09-2012
Publisher
Springer-Verlag
Published in
Polymer Bulletin / Issue 5/2012
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-012-0736-8

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