期刊
MACROMOLECULES
卷 42, 期 6, 页码 1867-1872出版社
AMER CHEMICAL SOC
DOI: 10.1021/ma8024909
关键词
-
资金
- Camille and Henry Dreyfus New Faculty Award Program
- Petroleum Research Fund [48399-G7]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0847515] Funding Source: National Science Foundation
Here we report the kinetics of the surface-initiated atom transfer radical polymerization (ATRP) of styrene from the surface of functionalized montmorillonite clay as a function of graft density. Compared with analogous ATRP reactions with free initiator, we observe a seven-fold increase in the polymerization rate at the highest graft density, similar to 1 chain/nm(2), whereas bulk kinetics are recovered as the graft density is reduced. We hypothesize that this phenomenon is a consequence of local concentration heterogeneities that shift the ATRP equilibrium in favor of the active state and present a simple phenomenological kinetic model that accounts for our data. These findings present an important consideration relevant to the design of precisely defined molecular architectures from Surfaces via surface-initiated ATRP.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据