Triblock Copolymers Based on Sucrose Methacrylate and Methyl Methacrylate: RAFT Polymerization and Self‐Assembly,Macromolecular Chemistry and Physics

当前位置： X-MOL 学术 › Macromol. Chem. Phys. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Triblock Copolymers Based on Sucrose Methacrylate and Methyl Methacrylate: RAFT Polymerization and Self‐Assembly
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-04-24 , DOI: 10.1002/macp.201900561
Raphael Henrique Marques Marcilli ₁ , Cesar Liberato Petzhold ₂ , Maria Isabel Felisberti ₁

Affiliation

ABA and BAB triblock amphiphilic copolymers based on sucrose methacrylate and methyl methacrylate are synthesized by sequential reversible addition–fragmentation chain transfer polymerization using S,S′‐bis(R,R′‐dimethyl‐R′′‐acetic acid)‐trithiocarbonate as a chain transfer agent. The copolymers present narrow molar mass dispersity, controlled molar mass and architecture as determined by gel permeation chromatography and ¹H and ¹³C nuclear magnetic resonance. The copolymers with molar and mass fractions of poly(sucrose methacrylate) block ranging from 1 to 22 mol% and 3 to 52 wt%, respectively, and different molar masses present characteristics of a surfactant such as self‐assembly. The self‐assembly of the triblock copolymers in water, N,N‐dimethylformamide (DMF), dichloromethane, tetrahydrofuran, or benzene results mostly in vesicles as confirmed by scanning electron microscopy images and small‐angle X‐ray of the dispersions. Moreover, the copolymers present the capability to stabilize aromatic molecules (Nile Red dye) and nonpolar solvents in an aqueous phase and polar ionic molecules (methylene blue) and water in a nonpolar medium, suggesting the potential for application in drug encapsulation, environmental remediation systems, and molecular extraction in liquid–liquid immiscible systems, for example. Films prepared by casting from copolymer solutions in DMF present a lamellar structure with the lamellar thickness varying according to the copolymer molar mass.

中文翻译：

基于甲基丙烯酸蔗糖和甲基丙烯酸甲酯的三嵌段共聚物：RAFT聚合和自组装

基于甲基丙烯酸酯的蔗糖和甲基丙烯酸甲酯ABA和BAB三嵌段两性共聚物是通过使用连续的可逆加成-断裂链转移聚合合成小号，小号双（[R ，- [R ' -二甲基- [R '' -乙酸）三硫代碳酸酯作为链转移剂。通过凝胶渗透色谱法和¹ H和¹³测定，该共聚物的摩尔质量分散性窄，摩尔质量和结构受控C核磁共振。聚甲基丙烯酸蔗糖酯的摩尔分数和质量分数分别为1至22 mol％和3至52 wt％的共聚物，不同的摩尔质量表现出表面活性剂的特性，例如自组装。三嵌段共聚物在水中N，N的自组装二甲基甲酰胺（DMF），二氯甲烷，四氢呋喃或苯主要在囊泡中产生，这是通过扫描电子显微镜图像和分散体的小角度X射线证实的。此外，该共聚物还具有在水相中稳定芳香分子（尼罗红染料）和非极性溶剂以及在非极性介质中稳定极性离子分子（亚甲基蓝）和水的能力，这表明其可用于药物封装，环境修复系统，以及在液-液不混溶系统中的分子提取。由DMF中的共聚物溶液流延制备的膜呈现出层状结构，其层状厚度根据共聚物的摩尔质量而变化。

更新日期：2020-04-24

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11