Chemical modifications, mechanical properties and surface photo-oxidation of films of polystyrene (PS)

被引：50

作者：

Bottino, FA ^{[1
]}

Cinquegrani, AR ^{[1
]}

Di Pasquale, G ^{[1
]}

Leonardi, L ^{[1
]}

Pollicino, A ^{[1
]}

机构：

[1] Univ Catania, Fac Ingn, Dept Metadol Fis & Chim Ingn, I-95125 Catania, Italy

来源：

POLYMER TESTING | 2004年 / 23卷 / 04期

关键词：

polystyrene; photo-oxidation; accelerated weathering; mechanical properties; surface modifications;

D O I：

10.1016/j.polymertesting.2003.10.001

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Films of polystyrene (PS) were exposed to accelerated weathering in a Xenotest Alpha apparatus to mimic outdoor conditions (lambdagreater than or equal to300 nm). The changes of the chemical structure in the films were studied by Fourier transform infrared spectroscopy (FT-IR) and the surface photo-oxidation by X-ray-photoelectron spectroscopy (XPS). The number of main-chain scissions and the changes in the molecular weight distribution were estimated by gel permeation chromatography (GPC). In particular, during the first stage of the photo-oxidation, the mechanical properties (stress at the breaking point (sigma(b)) and strain at the breaking point (epsilon(b))) of the PS films are strongly dependent on the degree of surface oxidation. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：405 / 411

页数：7

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