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<p>In this contribution, well-defined poly(ɛ-caprolactone-<i>b</i>-4-vinylbenzyl-<i>g</i>-ethyleneglycol) [poly(ɛ-CL-<i>b</i>-VB-<i>g</i>-EG)] block-brush terpolymer was prepared via reversible addition/fragmentation chain transfer (RAFT), ring-opening polymerization (ROP) and grafting to “click” chemistry methods. For this purpose, in the first part, a RAFT agent was obtained by the reaction of 3-chloro-1-propanol and ethylxanthic acid potassium salt for the one-step RAFT-ROP polymerization. In the second part, the poly(ɛ-caprolactone-<i>b</i>-4-vinyl benzyl chloride) [poly(ɛ-CL-<i>b</i>-VBC)] block copolymer was prepared by RAFT polymerization of 4-vinyl benzyl chloride, and ROP of ɛ-caprolactone in the presence of RAFT agent in the one-step. In the third part, the poly(ɛ-caprolactone-<i>b</i>-4-vinyl benzyl-N<sub>3</sub>) (azide-terminated) was obtained from reaction of the poly(ɛ-CL-<i>b</i>-VBC) block copolymer and NaN<sub>3</sub>. Finally, the poly(ɛ-CL-<i>b</i>-VB-<i>g</i>-EG) block-brush terpolymer was prepared from the reaction PEG-propargyl, which obtained by the reaction of polyethylene glycol (PEG-3000) with propargyl chloride, and poly(ɛ-CL-<i>b</i>-VB-N<sub>3</sub>) via the grafting to "click" chemistry method. The structure of the final products was characterized by methods such as GPC, <sup>1</sup>H-NMR, FT-IR, DSC, and SEM.</p>

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Synthesis of block-brush terpolymer via one-step RAFT-ROP and grafting to "click" chemistry methods

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  • 发表日期：

    2025年3月5日

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  • Melahat Göktaş,
  • Cengiz Aykaç

摘要

In this contribution, well-defined poly(ɛ-caprolactone-b-4-vinylbenzyl-g-ethyleneglycol) [poly(ɛ-CL-b-VB-g-EG)] block-brush terpolymer was prepared via reversible addition/fragmentation chain transfer (RAFT), ring-opening polymerization (ROP) and grafting to “click” chemistry methods. For this purpose, in the first part, a RAFT agent was obtained by the reaction of 3-chloro-1-propanol and ethylxanthic acid potassium salt for the one-step RAFT-ROP polymerization. In the second part, the poly(ɛ-caprolactone-b-4-vinyl benzyl chloride) [poly(ɛ-CL-b-VBC)] block copolymer was prepared by RAFT polymerization of 4-vinyl benzyl chloride, and ROP of ɛ-caprolactone in the presence of RAFT agent in the one-step. In the third part, the poly(ɛ-caprolactone-b-4-vinyl benzyl-N3) (azide-terminated) was obtained from reaction of the poly(ɛ-CL-b-VBC) block copolymer and NaN3. Finally, the poly(ɛ-CL-b-VB-g-EG) block-brush terpolymer was prepared from the reaction PEG-propargyl, which obtained by the reaction of polyethylene glycol (PEG-3000) with propargyl chloride, and poly(ɛ-CL-b-VB-N3) via the grafting to "click" chemistry method. The structure of the final products was characterized by methods such as GPC, 1H-NMR, FT-IR, DSC, and SEM.