Nanosecond dynamics of poly(methyl methacrylate) brushes in solvents studied by fluorescence depolarization method

被引：11

作者：

Aoki, Hiroyuki ^{[1
]}

Kitamura, Masafumi ^{[1
]}

Ito, Shinzaburo ^{[1
]}

机构：

[1] Kyoto Univ, Dept Polymer Chem, Kyoto 6158510, Japan

来源：

MACROMOLECULES | 2008年 / 41卷 / 02期

关键词：

D O I：

10.1021/ma7022149

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Nanosecond dynamics of poly(methyl methacrylate) (PMMA) brushes in solvents studied by fluorescence depolarization method is presented. The dye-labeled graft PMMA was prepared by the surface-initiated atom transfer radical polymerization of methyl methacrylate (MMA) and perylenyl methyl methacrylate (PeMMA). A clean quartz plate was immersed in a toluene solution of [2-(4-chlorosulfonylphenyl)-ethyl]trichlorosilane (CTCS) and phenethyltrichlorosilane (PhTCS) for 2 hours. The thickness of graft PMMA film was measured by atomic force microscopy and the time-resolved fluorescence anisotropy was measured by time-correlated single photon counting (TCSPC) method. The free PMMA chain in the solution at a concentration of 0.33g/mL showed the decay of fluorescence anisotropy with a correlation time of 9.9 ns slower than in the dilute solution.

引用

页码：285 / 287

页数：3

共 26 条

[1]

AOKI H, 1997, POLYM B, V37, P109

[2] Excluded-volume effects on the hydrodynamic radius of atactic and isotactic oligo- and poly(methyl methacrylate)s in dilute solution [J].