文献类型：期刊文献

英文题名：Facile synthesis of asymmetric molecular brushes with triple side chains using a multivalent monomer strategy

作者：Cao, Shiya[1];Liu, Wenyi[1];Yang, Bicai[1];Zheng, Yuan[1];Lin, Shaoliang[1];Xu, Binbin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat ,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：15

期号：35

起止页码：3552

外文期刊名：POLYMER CHEMISTRY

收录：;EI(收录号：20243416905654);WOS:【SCI-EXPANDED(收录号:WOS:001290425500001)】；

基金：The authors are thankful for financial support from the National Natural Science Foundation of China (52273008, 52325308, 52073092), the Shanghai Scientific and Technological Innovation Project (22ZR1479300), and the Shanghai Rising-Star Program (23QA1402500).

语种：英文

外文关键词：Atom transfer radical polymerization - Azobenzene - Elastomers - Emulsion polymerization - Emulsions - Ring opening polymerization - Self assembly

摘要：Heterografted molecular brushes (HMBs) bearing two or more types of side chains have attracted tremendous attention because of their asymmetric structures and multiple functionalities. However, the controlled synthesis of HMBs with three types of side chains remains a challenge. The structure-property-application correlations of HMBs with three types of side chains are still not clear. Herein, based on the multivalent monomer strategy, we report the synthesis of well-defined asymmetric HMBs comprising three different side chains by sequential reversible addition-fragmentation chain transfer (RAFT) polymerization, atom transfer radical polymerization (ATRP), thiol-epoxy coupling reaction, and ring-opening polymerization (ROP). PA-g-PAzo/PEG/PLA with a polyacrylate (PA) backbone, hydrophobic poly(azobenzene-methacrylate) (PAzo) brush, hydrophilic polyethylene glycol (PEG) brush, and hydrophobic polylactide (PLA) brush was synthesized and characterized. The self-assembly behavior of PA-g-PAzo/PEG/PLA with a short backbone and relatively strong intermolecular association in solutions was investigated. Well-defined platelets with tunable morphologies were constructed. Subsequently, PA-g-PFA/PEG/PLA with a fluorophilic poly(pentafluoropropyl acrylate) (PFA) brush, hydrophilic PEG brush, and lipophilic PLA brush was synthesized and further used as an efficient surfactant for the stabilization of different emulsions. Our study offers a platform for exploring the unique properties of asymmetric HMBs. Heterografted molecular brushes comprising three different brushes were synthesized based on the Br-acrylate-epoxide multivalent monomer strategy, which enabled the fabrication of 2D platelets and the stabilization of different emulsions.