Infrared spectrum of polyvinyl chloride. I

Abstract In order to assign the infrared spectrum of polyvinyl chloride, we obtained the polarized infrared spectra of polyvinyl chloride, the spectral changes of the molten sample, and the infrared spectrum of polyvinyl bromide. The polarized infrared spectra of polyvinyl chloride which we had obtained showed satisfactory agreement with previous reports. The infrared spectra of polyvinyl chloride and polyvinyl bromide resembled each other. From the frequency defferences of the corresponding bands of both polymers, we assigned the bands at 690, 635, and 615 cm. −1 to the CCl‐stretching modes in the spectrum of polyvinyl chloride. We found four bands in the CH‐ and CH 2 ‐stretching region of polyvinyl chloride as Krimm and Liang stated in their paper.