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Synthesis of amphiphilic tadpole‐shaped copolymers by combination of glaser coupling with living anionic polymerization and ring‐opening polymerization
| Content Provider | Semantic Scholar |
|---|---|
| Author | Wang, Guowei Fan, Xiaoshan Zhang, Yannan Huang, Junlian |
| Copyright Year | 2012 |
| Abstract | The tadpole-shaped copolymers polystyrene (PS)-b- (cyclic poly(ethylene oxide) (PEO)) (PS-b-(c-PEO)) contained lin- ear tail chains of PS and cyclic head chains of PEO were syn- thesized by combination of Glaser coupling with living anionic polymerization (LAP) and ring-opening polymerization (ROP). First, the functionalized polystyrene-glycerol (PS-Gly) with two active hydroxyl groups at x end was synthesized by LAP of St and the subsequent capping with 1-ethoxyethyl glycidyl ether and then deprotection of protected hydroxyl group in acid condition. Then, using PS-Gly as macroinitiator, the ROP of EO was performed using diphenylmethylpotassium as cocata- lyst for AB2 star-shaped copolymers PS-b-(PEO-OH)2, and the alkyne group was introduced onto PEO arm end for PS-b-(PEO- Alkyne)2. Finally, the intramolecular cyclization was performed by Glaser coupling reaction in pyridine/Cu(I)Br/N,N,N 0 ,N 00 ,N 00 - pentamethyldiethylenetriamine system under room tempera- ture, and tadpole-shaped PS-b-(c-PEO) was formed. The target copolymers and their intermediates were well characterized by size-exclusion chromatography, proton nuclear magnetic reso- nance spectroscopy, and fourier transform infrared spectros- copy in details. The thermal properties was also determined and compared to investigate the influence of architecture on properties. The results showed that tadpole-shaped copolymers had lower Tm, Tc ,a ndXc than that of their precursors of AB2 star-shaped copolymers. V C 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 50: 2227-2235, 2012 |
| Starting Page | 2227 |
| Ending Page | 2235 |
| Page Count | 9 |
| File Format | PDF HTM / HTML |
| DOI | 10.1002/pola.25996 |
| Volume Number | 50 |
| Alternate Webpage(s) | http://www.polymer.fudan.edu.cn/polymer/research/WGWLAB/ckfinder/userfiles/files/2012%20Synthesis%20of%20Amphiphilic%20Tadpole-Shaped%20Copolymers.pdf |
| Alternate Webpage(s) | https://doi.org/10.1002/pola.25996 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
