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| Content Provider | Springer Nature Link |
|---|---|
| Author | Gao, Yonggang Qin, Yusheng Zhao, Xiaojiang Wang, Fosong Wang, Xianhong |
| Copyright Year | 2012 |
| Abstract | Colorless oligo(carbonate-ether) diols were selectively synthesized in high efficiency from copolymerization of CO$_{2}$ and propylene oxide (PO) using Zn$_{3}$[Co(CN)$_{6}$]$_{2}$-based double metal cyanide complex (DMC) as catalyst and different molecular weight polypropylene glycols (PPGs) as chain transfer agent. The catalytic activity was related to carbonate unit content and molecular weight of target oligo(carbonate-ether) diols, for oligo(carbonate-ether) diol with number average molecular weight of 6.4 kg/mol and carbonate unit content of 34.3 %, it reached 10.0 kg oligomer/g DMC catalyst during 10 h of copolymerization. Generally, the number average molecular weight of the oligo(carbonate-ether) diol was tunable between 1.8 kg/mol and 6.4 kg/mol, and the molecular weight distribution was controllable between 1.14 and 1.83. Moreover, the carbonate unit content in the oligo-diols can be adjusted between 15.3 % and 62.5 %, lower temperature and higher CO$_{2}$ pressure were favorable for higher carbonate content. Better selectivity of oligo(carbonate-ether)diol over propylene carbonate(PC) was realized, where the weight ratio of PC (W$_{PC}$) was controlled less than 8.0 wt%. We also found that the alkali metal ion residue may play an important role in PC formation, in some cases this effect may be more significant than backbiting process, removing the residual alkali metal ion should be meaningful in the future to further reduce the PC formation. |
| Starting Page | 1 |
| Ending Page | 9 |
| Page Count | 9 |
| File Format | |
| ISSN | 10229760 |
| Journal | Journal of Polymer Research |
| Volume Number | 19 |
| Issue Number | 5 |
| e-ISSN | 15728935 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2012-04-25 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Carbon dioxide Propylene oxide Double metal cyanide complex catalyst Oligo(carbonate-ether) diols Industrial Chemistry/Chemical Engineering Polymer Sciences Characterization and Evaluation of Materials |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Materials Chemistry Polymers and Plastics |
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