MEASUREMENTS OF INFRARED FREQUENCY-SHIFTS IN STRESSED POLYMERS

被引：30

作者：

WOOL, RP

机构：

来源：

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 1981年 / 19卷 / 03期

关键词：

408 Structural Design - 801 Chemistry - 815 Polymers and Polymer Science - 921 Mathematics - 941 Acoustical and Optical Measuring Instruments;

D O I：

10.1002/pol.1981.180190305

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In the reported study, a difference-spectrum method is used to measure vibrational frequency shifts in mechanically stressed polymers. It is shown that the peak-to-peak height of the difference-spectrum intensity profile is a linear function of small frequency shifts with a slope inversely proportional to the band halfwidth for Lorentzian or Gaussian bands. The method is applied to measure frequency shifts in uniaxially stressed ultraoriented isotactic polypropylene films, using a double beam infrared grating dispersion spectrometer with a nonstressed sample in the reference beam. It is shown that frequency shifts can be measured with an accuracy of better than 0. 01 cm** minus **1 using the difference-spectrum method.

引用

页码：449 / 457

页数：9