Synthesis,Characterization and Aqueous Solution Behavior of a pH-responsive Double Hydrophilic Block Copolymer |
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| Authors: | Xu Du Yebang Tan Hong Wang Lei Zhang Xiaona Ren |
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| Institution: | 1. School of Chemistry and Chemical Engineering , Shandong University , Jinan, P.R. China;2. School of Chemistry and Chemical Engineering , Shandong University , Jinan, P.R. China;3. Key Laboratory of Special Functional Aggregated Materials, Ministry of Education , Jinan, P.R. China |
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| Abstract: | The pH-responsive double hydrophilic block copolymer poly(ethylene glycol)-b-poly(methacylic acid-co-4-vinyl benzylamine hydrochloride salt) (PEG-b-PMAA/PVBAHS) was synthesized. A series of PEG-b-PMAA/PVBAHS with different molecule weights and compositions were characterized by IR, 1H-NMR, elemental analysis and TGA. With different MAA/VBAHS ratio, the PEG-b-PMAA/PVBAHS copolymers had the different isoelectric point (IEP). Supermolecular structures of the block copolymers could be formed by the interionic interactions at different solution pH. Experiment results showed that the structures of the pH-responsive copolymers in aqueous solution could be changed at different pH environments. The aggregation of this double hydrophilic block copolymer in aqueous solution was determined by both of solution pH and copolymer composition. |
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| Keywords: | pH-responsive double hydrophilic block copolymer solution behavior |
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