Infrared spectroscopy and polymer structure

S. Krimm
1968 Pure and Applied Chemistry  
INTRODUCTION The power of infrared spectroscopy as a tool in studying the structure of small molecules is well known. This insight into structure results largely from our ability to analyse the spectrum theoretically by means of a normal coordinate analysis. This technique consists of calculating the normal vibration frequencies of a molecule from information on its structure and internal force field. From such a calculation we obtain the values of the frequencies and the forms of the
more » ... ms of the vibrations of the molecule which can be observed in infrared absorption and in Raman scattering. By comparing such calculated frequencies with the observed spectrum it is possible to evaluate our assumptions concerning the structure and force field of the molecule. A review article published in 1960k stressed the importance of extending such theoretical methods of analysis to the study of the infrared spectra of high polymers. Only in this way could the full power of spectroscopy be brought to bear on answering questions related to the structure of, and interactions between, macromolecules. Prior to 1960 the few normal
doi:10.1351/pac196816020369 fatcat:bj5gzpkvffdv5i3x5yuzhuicj4