A MALDI, TGA, TG/MS, and DEA study of the irradiation effects on PMMA

被引：28

作者：

Tatro, SR ^{[1
]}

Baker, GR ^{[1
]}

Bisht, K ^{[1
]}

Harmon, JP ^{[1
]}

机构：

[1] Univ S Florida, Dept Chem, Tampa, FL 33620 USA

来源：

POLYMER | 2003年 / 44卷 / 01期

关键词：

matrix assisted laser desorption/ionization; poly(methyl methacrylate); radiation;

D O I：

10.1016/S0032-3861(02)00727-9

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(methyl methacrylate) (PMMA) (M-w = 6.4 X 10(3), PD = 1.06) was irradiated under vacuum. The constant dose rate was 1.66 X 10(4) rad/min at doses between 10 and 100 Mrad using a cobalt-60 source. The samples were then analyzed by matrix assisted laser desorption/ionization (MALDI), hyphenated thermogravimetric/mass spectrometry (TG/MS), and dielectric analysis (DEA), all novel methods for the analysis of polymers damaged by radiation. Gel permeation chromatography (GPC), nuclear magnetic resonance (NMR), and differential scanning calorimetry (DSC) were also used for analysis. This study evidenced main chain scission, the removal of ester side groups, and the production of monomer as a result of ionizing radiation. (C) 2002 Elsevier Science Ltd. All rights reserved.

引用

页码：167 / 176

页数：10

共 69 条

[21] Dynamical mechanical properties of polymethylmethacrylate after exposure to Co-60 gamma radiation [J].