A robust and high-throughput measurement platform for monomer reactivity ratios from surface-initiated polymerization
A robust and high-throughput measurement platform for monomer reactivity ratios from surface-initiated polymerization
复制标题
强大的高通量测量平台，用于测量表面引发聚合的单体反应率
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
K. Beers
中科院分区：
文献类型：
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作者：
Derek L. Patton;K. Page;Emily A. Hoff;M. Fasolka;K. Beers
本文介绍了一种强大的方法来测量单体的竞聚率从表面引发的共聚反应，通过测量统计共聚物刷表面的组成，使用X射线光电子能谱。采用表面引发自由基聚合法，在室温紫外光照射下，以不同单体为原料制备了统计共聚物刷。的共聚物刷组合物的数据进行了拟合的终端共聚动力学模型，导致在本体反应条件下测得的值在良好的协议的单体竞聚率的点估计。此外，一个高通量的方法被证明是使用一个单一的基板表现出梯度的共聚物刷组合物来测量竞聚率。这种高通量的方法显着减少了所需的时间和精力，以产生可靠的和可重复的点估计的竞聚率，这些值是在良好的协议与离散样品表面测量和经典的散装分析方法获得的值。
This article describes a robust approach to measure monomer reactivity ratios from surface-initiated copolymerization, by measuring composition of statistical copolymer brush surfaces using X-ray photoelectron spectroscopy. Statistical copolymer brushes were prepared from various monomer feeds by surface-initiated radical copolymerization at room temperature under ultraviolet (UV) irradiation. The copolymer brush composition data were fit to the terminal copolymerization kinetic model resulting in point estimates for the monomer reactivity ratios that are in good agreement with values measured under bulk reaction conditions. Additionally, a high-throughput approach was demonstrated to measure reactivity ratios using a single substrate exhibiting a gradient in copolymer brush composition. This high-throughput approach significantly reduces the time and effort required to generate reliable and reproducible point estimates of reactivity ratios, and these values are in good agreement with values obtained from both the discrete sample surface measurements and classical bulk analytical methods.