Matrix-free Particle Brush System with Bimodal Molecular Weight Distribution Prepared by SI-ATRP
Matrix-free Particle Brush System with Bimodal Molecular Weight Distribution Prepared by SI-ATRP
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DOI：
10.1021/acs.macromol.5b01905
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发表时间：
2015-11
期刊：
影响因子：
5.5
通讯作者：
Jiajun Yan;Tyler Kristufek;M. Schmitt;Zongyu Wang;Guojun Xie;Alei Dang;C. Hui;J. Pietrasik;M. Bockstaller;K. Matyjaszewski
中科院分区：
文献类型：
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作者：
Jiajun Yan;Tyler Kristufek;M. Schmitt;Zongyu Wang;Guojun Xie;Alei Dang;C. Hui;J. Pietrasik;M. Bockstaller;K. Matyjaszewski
用聚合物链对纳米颗粒表面进行改性普遍用于设计纳米颗粒填料的物理化学性质，并实现基于具有受控微观结构的聚合物杂化材料的新材料技术。用不同（高和低）聚合度的聚合物链束缚颗粒（所谓的“双峰聚合物接枝”）已成为一种特别有趣的策略，它结合了致密和稀疏聚合物接枝的协同效益（即，通过致密接枝聚合物链与稀疏接枝系统的高无机含量特征促进颗粒相互作用的良好控制）。在这篇文章中，表面引发的原子转移自由基聚合（SI-ATRP）被证明是一种多功能工具，可以通过精确控制各个接枝物种的聚合度来合成双峰接枝改性。对于聚苯乙烯系链二氧化硅的特殊情况...
The modification of the surface of nanoparticles with polymeric chains is ubiquitously used to engineer the physicochemical properties of nanoparticle fillers and to enable new material technologies based on polymer hybrid materials with controlled microstructure. The tethering of particles with polymeric chains of distinct (high and low) degree of polymerization (so-called “bimodal polymer grafts”) has emerged as a particularly interesting strategy to combine the synergistic benefits of dense and sparse polymer grafts (i.e., good control of particle interactions facilitated by densely grafted polymer chains with the high inorganic content characteristic for sparsely grafted systems). In this contribution, surface-initiated atom transfer radical polymerization (SI-ATRP) is demonstrated to be a versatile tool that enables the synthesis of bimodal graft modifications with precise control of the degree of polymerization of the respective graft species. For the particular case of polystyrene-tethered silica p...