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Quartz crystal microbalance study of the kinetics of surface initiated polymerization
Chen XA; Zhang YZ; He JA; Xiong CY; Meng YH(孟永宏); Jin G(靳刚); Ma HW
Source PublicationScience in China Series B-Chemistry
AbstractSurface 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.
Indexed BySCI
WOS IDWOS:000272917200039
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNationd Natural Science Foundation of China [20604402] ; Natural Science Foundation of Beijing [2072008] ; National Basic Research Program of Chian [2009CB320300]
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Recommended Citation
GB/T 7714
Chen XA,Zhang YZ,He JA,et al. Quartz crystal microbalance study of the kinetics of surface initiated polymerization[J]. Science in China Series B-Chemistry,2009,52(12):2307-2322.
APA Chen XA.,Zhang YZ.,He JA.,Xiong CY.,孟永宏.,...&Ma HW.(2009).Quartz crystal microbalance study of the kinetics of surface initiated polymerization.Science in China Series B-Chemistry,52(12),2307-2322.
MLA Chen XA,et al."Quartz crystal microbalance study of the kinetics of surface initiated polymerization".Science in China Series B-Chemistry 52.12(2009):2307-2322.
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