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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wang, Liang Jia, Xiaohua Liu, Xiaohang Yuan, Zhi Huang, Jiaxian |
| Copyright Year | 2006 |
| Abstract | A class of novel amphiphilic diblock copolymer of MePEG-b-poly(DL-lactide-co-RS-β-malic acid) has been synthesized via the hydrogenation over palladium on charcoal of MePEG-b-poly(DL-lactide-co-RS-β-benzyl malolactonate), which was prepared by ring-opening copolymerization of DL-lactide and RS-β-benzyl malolactonate (MABz) using methyl-polyethylene glycol (MePEG) as the initiator and stannous octoate as the catalyst. The influence of copolymerization temperature, reaction time, macro-initiator (MePEG-5000) proportion and monomer ratio was studied. Gel permeation chromatography measurements revealed that the molecular weight decreased with increasing MABz feeding dose. The configurational structures of the protected and de-protected copolymers were determined by 13C nuclear magnetic resonance (NMR), 1H NMR and Fourier transform infrared. A water-swollen core of the nanospheres formed from the de-protected copolymer was discovered by transmission electron microscopy measurement. Additionally, the degradation experiments indicated that more hydrophilic malic acid content led to higher degradation rate. |
| Starting Page | 273 |
| Ending Page | 281 |
| Page Count | 9 |
| File Format | |
| ISSN | 0303402X |
| Journal | Colloid and Polymer Science |
| Volume Number | 285 |
| Issue Number | 3 |
| e-ISSN | 14351536 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2006-09-28 |
| Publisher Place | Berlin/Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | MePEG-b-poly(DL-lactide-co-RS-β-malic acid) MePEG-b-poly(DL-lactide-co-RS-β-benzyl malolactonate) Hydrogenolysis Nanosphere Degradation Food Science Characterization and Evaluation Materials Soft Matter, Complex Fluids Physical Chemistry Polymer Sciences |
| Content Type | Text |
| Resource Type | Article |
| Subject | Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics |
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