PVC降解的光声光谱的小波分析

高分子材料科学与工程, 2001, 17(3): 143-145.

PVC降解的光声光谱的小波分析

陈刚 ^1, , 范文秀 ^2, , 李婉 ^3, , 宛寿康 ^4, , 苏庆德 ^5,

1.中国科学技术大学化学系,

2.河南职业技术师范学院基础部,

3.中国科学技术大学化学系,

4.中国科学技术大学化学系,

5.中国科学技术大学化学系,

基金项目: 国家自然科学基金(29875026)

关键词：聚氯乙烯 , 降解 , 光声光谱 , 小波分析

WAVELET ANALYSIS ON PHOTOACOUSTIC SPECTRA OF DEGRATED PVC

小波变换能够成功地滤除复杂光声光谱信号的高频噪音和不规则基线。文中将小波变换的分析方法应用于PVC降解的光声光谱中，准确地测定了PVC降解产生的共轭多烯的分布，进而讨论了不同PVC热稳定剂、不同时间对降解的影响，获得了满意的结果。

Wavelet transform can be used successfully to filter the noise and the irregular baseline in complicated photoacoustic(PA) spectra. In this paper, PA spectra combined with wavelet transform provides an objective and accurate method to determinate the polyene distribution of degraded PVC. The influence of degradation by different PVC thermal stabilizers, different stage were discussed. The results were satisfactory.

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