Surface-confined radical chain transfer - The intermediate reaction for chemically attaching polymer films on porous silica for chromatographic application

被引：13

作者：

Liu, SJ ^{[1
]}

Zhou, F ^{[1
]}

Di, DL ^{[1
]}

Jiang, SX ^{[1
]}

机构：

[1] Chinese Acad Sci, Lanzhou Inst Chem Phys, Lanzhou 730000, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2004年 / 244卷 / 1-3期

关键词：

chain transfer reaction; surface-initiated polymerization; high-performance liquid chromatography; stationary phase; methylmethacrylate;

D O I：

10.1016/j.colsurfa.2004.05.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Surface-confined chain transfer reaction in free radical polymerization of different monomers leads to polymer-grafted silica particles. Porous silica is selected as the carrier of potential thiol chain transfer groups and as stationary phase in high-performance liquid chromatography (HPLC). The thiol-terminated silica and polymer over-layer-modified silica are characterized by FT-IR and Raman spectra. The chemical composite and the grafting amount of polymer on silica surface are measured by X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA), etc. The grafting amount of polymer on silica surface and the molecular weight of free polymer formed in bulk solution decrease with the addition of thiol-terminated silica coincide with each other. The obtained polymethylmethacrylate (PMMA)-modified silica exhibits excellent separation capacity for three series of selected compounds, i.e. aromatic compounds and alkaloids, and displays the reversed-phase separation mechanism. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：87 / 93

页数：7

共 20 条

[1]

BRANDRUP J, 1989, POLYM HDB, V81

[2] Living free radical photopolymerization initiated from surface-grafted iniferter monolayers [J].

de Boer, B ;

Simon, HK ;

Werts, MPL ;

van der Vegte, EW ;

Hadziioannou, G .

MACROMOLECULES, 2000, 33 (02) :349-356

[3]

FOSTER DJ, 2000, POLYMER, V41, P1385

[4] Grafting of hyperbranched polymers onto ultrafine silica: postgraft polymerization of vinyl monomers initiated by pendant initiating groups of polymer chains grafted onto the surface [J].

Hayashi, S ;

Fujiki, K ;

Tsubokawa, N .

REACTIVE & FUNCTIONAL POLYMERS, 2000, 46 (02) :193-201

[5]

Husemann M, 1999, ANGEW CHEM INT EDIT, V38, P647, DOI 10.1002/(SICI)1521-3773(19990301)38:5<647::AID-ANIE647>3.0.CO

[6]

2-0

[7] Controlled synthesis of polymer brushes by "Living" free radical polymerization techniques [J].

Husseman, M ;

Malmström, EE ;

McNamara, M ;

Mate, M ;

Mecerreyes, D ;

Benoit, DG ;

Hedrick, JL ;

Mansky, P ;

Huang, E ;

Russell, TP ;

Hawker, CJ .

MACROMOLECULES, 1999, 32 (05) :1424-1431

[8] Thermal behavior of alkylsiloxane self-assembled monolayers on the oxidized Si(100) surface [J].

Kluth, GJ ;

Sung, MM ;

Maboudian, R .

LANGMUIR, 1997, 13 (14) :3775-3780

[9] CHEMICALLY MODIFIED ELECTRODES .13. MONOLAYER-MULTILAYER COVERAGE, DECAY KINETICS, AND SOLVENT AND INTERACTION EFFECTS FOR FERROCENES COVALENTLY LINKED TO PLATINUM-ELECTRODES [J].

LENHARD, JR ;

MURRAY, RW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1978, 100 (25) :7870-7875

[10] Polymers at interfaces: Using atom transfer radical polymerization in the controlled growth of homopolymers and block copolymers from silicon surfaces in the absence of untethered sacrificial initiator [J].

Matyjaszewski, K ;

Miller, PJ ;

Shukla, N ;

Immaraporn, B ;

Gelman, A ;

Luokala, BB ;

Siclovan, TM ;

Kickelbick, G ;

Vallant, T ;

Hoffmann, H ;

Pakula, T .

MACROMOLECULES, 1999, 32 (26) :8716-8724

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