Quartz crystal microbalance study of the kinetics of surface initiated   polymerization

doi:10.1007/s11426-009-0225-6

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	Quartz crystal microbalance study of the kinetics of surface initiated polymerization
	Chen XinAn ; Zhang YaoZhong ; He JianAn ; Xiong ChunYang ; Meng YongHong ; Jin Gang ; Ma HongWei
刊名	中国科学b辑化学英文版
	2009
关键词	surface initiated polymerization quartz crystal microbalance kinetics controlled living radical polymerization TRANSFER RADICAL POLYMERIZATION METHYL-METHACRYLATE AMBIENT-TEMPERATURE SILICON SURFACES AQUEOUS-MEDIA BRUSHES POLYMERS DENSITY GOLD MONOLAYERS
DOI	10.1007/s11426-009-0225-6
英文摘要	Surface initiated polymerization (SIP) is a valuable tool in synthesizing functional polymer brushes, yet the kinetic understanding of SIP lags behind the development of its application. We apply quartz crystal microbalance (QCM) to address two issues that are not fully addressed yet play a central role in the rational design of functional polymer brushes, namely quantitative determination of the kinetics and the initiator efficiency (IE) of SIP. SIP are monitored online using QCM. Two quantitative frequency-thickness (f-T) relations make the direct determination and comparison of the rate of polymerization possible even for different monomers. Based on the bi-termination model, the kinetics of SIP is simply described by two variables, which are related to two polymerization constants, namely a = 1/(k (p,s,app)-[M][R center dot](0)) and b = k (t,s,app)/(k (p,s,app)[M]). Factors that could alter the kinetics of SIP are studied, including (i) the molecular weight of monomers, (ii) the solvent used, (iii) the initial density of the initiator, (iv) the concentration of monomer, [M], and (v) the catalyst system (ratio among the ingredients, metal, ligands, and additives). The dynamic nature of IE is also described by these two variables, IE = a/(a + bt). Instead of the molecular weight and the polydispersity, we suggest that film thickness, the two kinetic parameters (a and b), and the initial density of the initiator and IE be the parameters that characterize ultra-thin polymer brushes. Besides the kinetics study of SIP, the reported method has many other applications, for example, in the fast screening of catalyst system for SIP and other polymerization systems.; Chemistry, Multidisciplinary; SCI(E); EI; 4; ARTICLE; 12; 2307-2322; 52
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/154884]
专题	工学院
推荐引用方式 GB/T 7714	Chen XinAn,Zhang YaoZhong,He JianAn,et al. Quartz crystal microbalance study of the kinetics of surface initiated polymerization[J]. 中国科学b辑化学英文版,2009.
APA	Chen XinAn.,Zhang YaoZhong.,He JianAn.,Xiong ChunYang.,Meng YongHong.,...&Ma HongWei.(2009).Quartz crystal microbalance study of the kinetics of surface initiated polymerization.中国科学b辑化学英文版.
MLA	Chen XinAn,et al."Quartz crystal microbalance study of the kinetics of surface initiated polymerization".中国科学b辑化学英文版 (2009).