Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, 29208, USA.
Macromol Rapid Commun. 2017 Oct;38(19). doi: 10.1002/marc.201700300. Epub 2017 Aug 14.
The preparation of well-defined block copolymers using controlled radical polymerization depends on the proper order of monomer addition. The reversed order of monomer addition results in a mixture of block copolymer and homopolymer and thus has typically been avoided. In this paper, the low blocking efficiency of reversed monomer addition order is utilized in combination with surface initiated reversible addition-fragmentation chain-transfer polymerization to establish a facile procedure toward mixed polymer brush grafted nanoparticles SiO -g-(PS (polystyrene), PS-b-PMAA (polymethacrylic acid)). The SiO -g-(PS, PS-b-PMAA) nanoparticles are analyzed by gel permeation chromatography deconvolution, and the fraction of each polymer component is calculated. Additionally, the SiO -g-(PS, PS-b-PMAA) are amphiphilic in nature and show unique self-assembly behavior in water.
使用控制自由基聚合制备结构明确的嵌段共聚物取决于单体添加的正确顺序。单体添加顺序相反会导致嵌段共聚物和均聚物的混合物，因此通常会避免这种情况。在本文中，我们利用反向单体添加顺序的低阻断效率，结合表面引发可逆加成-断裂链转移聚合，建立了一种简便的方法来制备混合聚合物刷接枝纳米粒子 SiO -g-(PS(聚苯乙烯)、PS-b-PMAA(聚甲基丙烯酸))。通过凝胶渗透色谱解卷积对 SiO -g-(PS、PS-b-PMAA)纳米粒子进行分析，并计算出每种聚合物成分的分数。此外，SiO -g-(PS、PS-b-PMAA)具有两亲性，在水中表现出独特的自组装行为。
