Rapid and Efficient Synthesis of Star Polymers via Arm-First Monomer Emulsified Aqueous Ring-Opening Metathesis Polymerization (ME-ROMP)

被引：10

作者：

Hou, Wangmeng ^{[1
]}

Feng, Yilin ^{[1
]}

Zhou, Yingqing ^{[1
]}

Yin, Xiuzhe ^{[1
]}

Liu, Hong ^{[2
]}

Liu, Zhijia ^{[1
]}

Zhao, Tianyu ^{[1
]}

Shi, Yi ^{[1
]}

Chen, Yongming ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Mat Sci & Engn, Key Lab Polymer Composite & Funct Mat, Minist Educ, Guangzhou 510006, Peoples R China

[2] Henan Univ, Coll Chem & Mol Sci, Kaifeng 475004, Peoples R China

来源：

MACROMOLECULES | 2024年 / 57卷 / 07期

基金：

中国国家自然科学基金;

关键词：

BLOCK-COPOLYMERS; CROSS-LINKING; BOTTLEBRUSH; COMBINATION; ATRP; CORES;

D O I：

10.1021/acs.macromol.4c00191

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The combination of ring-opening metathesis polymerization (ROMP) and the arm-first strategy is a widely employed "one-pot two-batch" approach for synthesizing star polymers. However, the intramolecular cross-linking during the core formation in a homogeneous system significantly restricts the production of high-molar-mass star polymers with complete conversion of arms. In this study, we present a successful synthesis of star polymers with diverse chemical compositions and high molar mass using a monomer emulsified ROMP (ME-ROMP) approach based on the arm-first strategy. The arm-first ME-ROMP method involves sequentially injecting CH2Cl2 solution containing a G3 catalyst and hydrophobic cross-linker into aqueous solution of norbornene monomers under stirring. Benefiting from the confinement effect provided by ME-ROMP, the intermolecular cross-linking during core formation was greatly enhanced, resulting in well-defined star polymers with varied chemical compositions and up to 95% conversion of arms within minutes. Furthermore, the star polymers containing cationic copolymer arms exhibited low toxicity and demonstrated potential applications in inflammation inhibition.

引用

页码：3173 / 3182

页数：10

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