Molecular-Weight Determination of Polymer Brushes Generated by SI-ATRP on Flat Surfaces

被引：71

作者：

Kang, Chengjun ^{[1
]}

Crockett, Rowena M. ^{[2
]}

Spencer, Nicholas D. ^{[1
]}

机构：

[1] ETH, Dept Mat, Lab Surface Sci & Technol, CH-8093 Zurich, Switzerland

[2] Empa, Swiss Fed Labs Mat Sci & Technol, CH-8600 Dubendorf, Switzerland

来源：

MACROMOLECULES | 2014年 / 47卷 / 01期

关键词：

RADICAL POLYMERIZATION; ADSORPTION; MONOLAYERS; DENSITY; LINKER;

D O I：

10.1021/ma401951w

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A new type of photolabile, surface-initiated, atom-transfer radical polymerization (SI-ATRP) initiator 3-(2-bromo-2-methylpropanamido)-3-(2-nitrophenyl)propanoic acid was synthesized, and immobilized via an aminosilane linker onto a flat silicon surface. Poly(lauryl methacrylate) and polystyrene brushes were grown from the surface via SI-ATRP, and the surface-tethered polymer chains cleaved off under UV irradiation. The kinetics of the cleavage process were investigated; and an apparent. effect of osmotic forces within the polymer brush could be observed. The molecular weight of the cleaved polymers could be readily determined by means of size-exclusion chromatography.

引用

页码：269 / 275

页数：7

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