Probing Surface Concentration of Cyclic/Linear Blend Films Using Surface Layer MALDI-TOF Mass Spectrometry

被引：29

作者：

Wang, Shih-Fan ^{[1
]}

Li, Xiaopeng ^{[2
]}

Agapov, Rebecca L. ^{[1
]}

Wesdemiotis, Chrys ^{[1
,2
]}

Foster, Mark D. ^{[1
]}

机构：

[1] Univ Akron, Dept Polymer Sci, Akron, OH 44325 USA

[2] Univ Akron, Dept Chem, Akron, OH 44325 USA

来源：

ACS MACRO LETTERS | 2012年 / 1卷 / 08期

基金：

美国国家科学基金会;

关键词：

SAMPLE PREPARATION METHOD; POLYMER BLENDS; LINEAR-POLYMERS; SEGREGATION; PATHWAYS;

D O I：

10.1021/mz300271w

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Surface layer matrix-assisted laser desorption ionization time-of-flight mass spectrometry (SL-MALDI-TOF MS) is a powerful new surface sensitive technique to quantify the surface concentration of multicomponent polymer films with enrichment of one component at the surface. Its capabilities are demonstrated for the novel case of a blend of cyclic polystyrene with linear polystyrene, in which we find the composition of linear chains enriched at the surface after annealing, contrary to the expectation of a self-consistent field theory. The probing depth was confirmed to be monomolecular, which for these short chains is less than 2 nm, even though material at a much greater depth is removed by the analysis.

引用

页码：1024 / 1027

页数：4

共 22 条

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