Infrared spectra of high polymers. VII. Polyacrylonitrile

Abstract

The infrared spectrum of polyacrylonitrile has been obtained in the extended region of 70 to 3200 cm.−1 Polarized measurements were made on stretched and rolled specimens in the range of 350 to 3200 cm.−1. An analysis of the spectrum has been made on the basis of an atactic chain configuration, and has been shown to be in agreement with the observed data. Detailed assignments are proposed for all of the absorption bands in the spectrum, being aided by previous studies of high polymer spectra and by approximate normal frequency calculations for the nitrile group.

Novel regenerable N‐halamine polymeric biocides. II. Grafting hydantoin‐containing monomers onto cotton cellulose

“…Figure 1 shows the FTIR spectra of pure cotton and an ADMH/AN grafted cotton. In the grafted sample, the 2243 cm Ϫ1 band is attributed to (CN), 26 and the 1707 and 1770 cm Ϫ1 bands can be assigned to the imide and amide structures in hydantoin rings, respectively, 27 in agreement with the previous article. 23 This confirms that ADMH/AN mixtures can be grafted onto cotton cellulose.…”

Compatibility and interactions in polyacrylonitrile/soy protein isolate/polyurethane blends

“…3. PAN (A) shows bands at 2243, 1452, 1261, and 1732 cm -1 , which are attributed to the vibrations of nitrile (CN), methylene (CH 2 ), and methyl (CH) from the monomer acrylonitrile (AN), and carbonyl (C=O) from the monomer methyl acrylate (MA), respectively, in agreement with the literature [28]. SPI (C) shows bands at 1654, 1535, and 1240 cm -1 in this region, which are attributed to the vibrations of amideI, amideII and amide III.…”

Polyacrylonitrile/polyaniline composite nano/microfiber webs produced by different dopants and solvents

“…Pure PAN nanofibers display the characteristic absorption peak of nitrile groups at around 2242 cm À1 besides a series of characteristic peaks in the regions of 2930-2870 cm À1 , 1460-1450 cm À1 , 1380-1360 cm À1 , and 1290-1260 cm À1 , which are attributed to the vibrations of different modes of methylene group [51][52][53][54][55][56][57]. In the spectra of PAN/PANI composite nano/microfibers (Figure 4 (b) to (d)), a broad peak appeared at around 3390 cm À1 , which was due to the free imine (-NH) groups of PANI.…”