Depth profile analysis of the photochemical degradation of polycarbonate by infrared spectroscopy

被引：37

作者：

Nagai, N

Okumura, H

Imai, T

Nishiyama, I

机构：

[1] Toray Res Ctr Ltd, Shiga 5208567, Japan

[2] Daipla Wintes Co Ltd, Sanda, Hyogo 6671314, Japan

来源：

POLYMER DEGRADATION AND STABILITY | 2003年 / 81卷 / 03期

关键词：

polycarbonate; photo-degradation; infrared spectroscopy; depth profile; gradient shaving preparation; ATR;

D O I：

10.1016/S0141-3910(03)00135-6

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The depth profile of the chemical changes in polycarbonate after photochemical degradation was investigated by infrared reflection spectroscopy with gradient shaving preparation. In addition, a spectral simulation technique to interpret the infrared ATR spectra with multiple angles of incidence was applied. The polycarbonate plates were photo-irradiated for 24 and 72 h by a weather meter. A band at around 1600 cm(-1) caused by photo-Fries rearrangement was observed, and a carboxylic acid band caused by side-chain photo-oxidation was also observed. These drastic changes in the surface occurred to a depth of at least 0.5 mum. A technique employing IR simulation demonstrated that the drastic chemical changes occurred in the surface to a depth of 0.2 mum for 24 and 72 It treated samples. For a treatment time of at least 72 h, the rate of degradation is extreme in the region of a depth of 0-0.2 mum. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：491 / 496

页数：6

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