Citation: Ke Zheng, Jun-Po He. Amphiphilic Dendrimer-like Copolymers with High Chain Density by Living Anionic Polymerization[J]. Chinese Journal of Polymer Science, ;2019, 37(9): 875-883. doi: 10.1007/s10118-019-2247-7 shu

Amphiphilic Dendrimer-like Copolymers with High Chain Density by Living Anionic Polymerization

Ke Zheng ,
Jun-Po He ^,

State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200438, China

Corresponding author: Jun-Po He, jphe@fudan.edu.cn
Received Date: 9 January 2019
Revised Date: 25 February 2019
Accepted Date: 1 January 2019
Available Online: 12 April 2019

We report here a method for the preparation of amphiphilic dendrimer-like copolymers with dendritic polystyrene (PS) core and protonated poly(2-vinyl pyridine) (P2VP) or poly(methacrylic acid) (PMAA) shell. The method employed the efficient coupling reaction of anionic living polymer chains and chlorosilane. The synthesis started from a functionalized 3^rd generation dendritic polystyrene, G3PS-g-SiCl, used as the precursor. The dendrimer-like copolymer of styrene and 2-vinyl pyridine, G3PS-g-P2VP, was synthesized by direct coupling of living P2VPLi to the precursor. The dendrimer-like copolymer of styrene and tert-butyl methacrylate, G3PS-g-PtBMA, was synthesized by an indirect procedure in which a living polymer containing mainly PtBMA segment was attached to the precursor. Both methods resulted in the formation of dendrimer-like copolymers with the high molecular weights (up to 8.5 × 10⁶ Da), large molecular sizes (diameter up to 73 nm), and dense shells (number of arms up to 1300). These products, G3PS-g-P2VP and G3PS-g-PtBMA, were protonated with trifluoroacetic acid and acidic hydrolyzed, respectively. After transformation, amphiphilic dendrimer-like copolymers, G3PS-g-P2VPH⁺ and G3PS-g-PMAA, were obtained. Preliminary results on the solution properties of the amphiphilic products were presented.
- Dendrimer-like polymer,
- Living anionic polymerization,
- Amphiphilic copolymer
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