Journal
POLYMER CHEMISTRY
Volume 12, Issue 4, Pages 572-580Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0py01498b
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Funding
- National Natural Science Foundation (NSF) of China [21525419, 21931003]
- Ministry of Science and Technology of the People's Republic of China [2017YFC1103501]
- Beijing Nova Program of Science and Technology [Z191100001119122]
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The ABA triblock copolymer nanoparticles of PHPMA-b-PS-b-PHPMA with a hydrophobic core of PS and a hydrophilic corona of PHPMA were synthesized by dispersion RAFT polymerization. It was found that these nanoparticles have a larger diameter and higher chain density compared to similar PHPMA-b-PS diblock copolymer nanoparticles, making them efficient emulsifiers that can decrease interfacial tension.
ABA triblock copolymer nanoparticles of poly(2-hydroxypropyl methacrylate)-block-polystyrene-block-poly(2-hydroxypropyl methacrylate) (PHPMA-b-PS-b-PHPMA) with a hydrophobic core of the polystyrene (PS) block and a hydrophilic corona of the poly(2-hydroxypropyl methacrylate) (PHPMA) block were synthesized by dispersion RAFT polymerization. It is found that the particle diameter of the PHPMA-b-PS-b-PHPMA nanoparticles increases with the chain extension of the PS block and decreases with the increasing degree of polymerization (DP) of the PHPMA block. In comparison with the poly(2-hydroxypropyl methacrylate)-block-polystyrene (PHPMA-b-PS) diblock copolymer nanoparticles with a similar chemical composition, the PHPMA-b-PS-b-PHPMA nanoparticles have a larger diameter, and the chain density of the PHPMA chains tethered to the PS core is higher. It is found that the PHPMA-b-PS-b-PHPMA nanoparticles can decrease the n-hexane/water interfacial tension more than the PHPMA-b-PS nanoparticles and may act as an efficient emulsifier.
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