Department of Materials Science and Engineering, 5000 Forbes Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA.
J Am Chem Soc. 2010 Sep 15;132(36):12537-9. doi: 10.1021/ja105189s.
Surface-initiated atom-transfer radical polymerization is used to synthesize particle brushes with controlled fraction of extended and relaxed conformations of surface-grafted chains. In the semidilute brush limit, the grafting of polymeric ligands is shown to facilitate the formation of ordered yet plastic-compliant particle array structures in which chain entanglements give rise to fracture through a polymer-like crazing process that dramatically increases the toughness and flexibility of the particle assembly.
表面引发原子转移自由基聚合被用于合成具有可控伸展和松弛构象分数的粒子刷，其中表面接枝链。在半浓刷限，聚合配体的接枝被证明有利于形成有序且具有塑性顺应性的粒子阵列结构，其中链缠结导致通过类似于聚合物的银纹化过程发生断裂，从而显著提高粒子组装体的韧性和柔韧性。
