Citation: Shan Shi, Yang Yu, Tao Wang, Qian-man Wang, Chun Wang, Shin-ichi Kuroda. Poly(methyl methacrylate)/Poly(N-isopropylacrylamide) Core-Shell Particles Prepared by Seeded Precipitation Polymerization：Unusual Morphology and Thermo-sensitivity of Zeta Potential[J]. Chinese Journal of Polymer Science, ;2014, 32(5): 524-530. doi: 10.1007/s10118-014-1435-8 shu

Poly(methyl methacrylate)/Poly(N-isopropylacrylamide) Core-Shell Particles Prepared by Seeded Precipitation Polymerization：Unusual Morphology and Thermo-sensitivity of Zeta Potential

Corresponding author: Shan Shi,
Received Date: 12 August 2013
Revised Date: 20 December 2013

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 50943028) and the Program for Liaoning Excellent Talents in Universities (No. LJQ2011037).

Poly(methyl methacrylate)/poly(N-isopropylacrylamide) (PMMA/PNIPAM) core-shell particles were synthesized by seeded precipitation polymerization of N-isopropylacrylamide (NIPAM) in the presence of PMMA seed particles. The anionic potassium persulfate was used as initiator, and acrylic acid as functional comonomer. It was shown that the weight ratio of the PNIPAM shell to the PMMA core can be greatly increased through continuous addition of NIPAM monomer at a relatively slow rate. PMMA/PNIPAM particles with different shell thickness were obtained by varying the amount of charged NIPAM monomers. These particles exhibited unique nonspherical core-shell morphology. PMMA core was partially coated by dense hair-like or antler-like PNIPAM shell depending on the shell thickness. The measurement of these particles' zeta potential at different temperatures showed that the absolute value of zeta potential unusually decreased as the particle size decreased with temperature.
- Core-shell particle,
- Thermo-sensitive,
- Seeded precipitation polymerization,
- Synthesis
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