Abstract
The doubly thermo-responsive triblock copolymer nanoparticles of polystyrene-block-poly(N-isopropylacrylamide)-block-poly[N,N-(dimethylamino) ethyl methacrylate] (PS-b-PNIPAM-b-PDMAEMA) are successfully prepared through the seeded RAFT polymerization in situ by using the PS-b-PNIPAM-TTC diblock copolymer nanoparticles as the seed. The seeded RAFT polymerization undergoes a pseudo-first-order kinetics procedure, and the molecular weight increases with the monomer conversion linearly. The hydrodynamic diameter (D h) of the triblock copolymer nanoparticles increases with the extension of the PDMAEMA block. In addition, the double thermo-response behavior of the PS-b-PNIPAM-b-PDMAEMA nanoparticles is detected by turbidity analysis, temperature-dependent 1H-NMR analysis, and DLS analysis. The seeded RAFT polymerization is believed as a valid method to prepare triblock copolymer nanoparticles containing two thermo-responsive blocks.
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This work was financially supported by 973 Program of China, under the contract (No. 2015CB655105), the National Science Fund for Distinguished Young Scholars (No. 51225801), the National Natural Science Foundation of China (No. 51408275) and the Provincial Science and Technology Cooperation Project of Jiangsu-Guangxi cooperation project (No. BM2014050).
These authors contributed equally to this work.
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Li, Ql., Li, L., Wang, Hs. et al. The doubly thermo-responsive triblock copolymer nanoparticles prepared through seeded RAFT polymerization. Chin J Polym Sci 35, 66–77 (2017). https://doi.org/10.1007/s10118-016-1859-4
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DOI: https://doi.org/10.1007/s10118-016-1859-4