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| Content Provider | Springer Nature Link |
|---|---|
| Author | Wang, Hong Zhu, Yue jun Ren, Xiao na Zhang, Hong Tan, Ye bang |
| Copyright Year | 2013 |
| Abstract | A new pH-responsive block copolymer, methoxy poly(ethylene glycol)-b-poly[5-methacrylamido-pentylamine hydrochloride](mPEG-b-PMAAPA) was synthesized and characterized in this paper. The monomer 5-methacrylamido-pentylamine hydrochloride(MAAPA) and the macroinitiator(mPEG-ACVA) were synthesized, respectively, and mPEG-b-PMAAPA was then obtained by free radical polymerization. The structure and molecular weight of mPEG-b-PMAAPA were confirmed by hydrogen nuclear magnetic resonance($^{1}$H NMR) spectroscopy and gel permeation chromatography with multiangle laser light scattering(GPC-MALLS) measurements. At a low pH, it is hydrophilic due to the protonation of the primary amine groups. With increasing pH value, deprotonation occurs and the hydrophobicity of PMAAPA block increases. This molecular feature leads to interesting aggregation behavior of mPEG-b-PMAAPA in aqueous solutions at different pH values as revealed by dynamic light scattering(DLS) measurements, transmission electron microscopy(TEM) observations and resonance light scattering(RLS) measurements. |
| Starting Page | 389 |
| Ending Page | 395 |
| Page Count | 7 |
| File Format | |
| ISSN | 10059040 |
| Journal | Chemical Research in Chinese Universities |
| Volume Number | 29 |
| Issue Number | 2 |
| Language | English |
| Publisher | Jilin University and The Editorial Department of Chemical Research in Chinese Universities |
| Publisher Date | 2013-03-10 |
| Publisher Place | Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Polyamine Chemistry/Food Science Analytical Chemistry Physical Chemistry pH-Responsive Inorganic Chemistry Water soluble copolymer Block copolymer Organic Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Education |
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