Acrylonitrile butadiene rubber, FTIR

Figure 20.27 (a) FTIR spectra of acrylonitrile butadiene rubber (film casting) (b) Correlation graph of acrylonitrile content from Kjeldhal method and FTIR. Reproduced with permission fron Ref [108] 2007, Elsevier. 

Ameta, R., Mukhopadhyay, R., and Deurib, A.S. (2007) Application of FTIR in characterization of acrylonitrile-butadiene rubber (nitrile rubber). Polymer Testing,... 

Analytical investigations may be undertaken to identify7 the presence of an ABS polymer, characterize the polymer, or identify7 nonpolymeiic ingredients. Fourier transform infrared (ftir) spectroscopy is the method of choice to identify the presence of an ABS polymer and determine the acrylonitrile—butadiene—styrene ratio of the composite polymer (89,90). Confirmation of the presence of rubber domains is achieved by electron microscopy7. Comparison with available physical property7 data serves to increase confidence in the identification or indicate the presence of unexpected structural features. Identification of ABS via pyrolysis gas chromatography (91) and dsc ((92) has also been reported. 

FTIR spectroscopy has been applied in the study of polymer blends including Neoprene rubber, chlorosulfonated PE, nitrile rubber, polyvinyl chloride (PVC) containing carbon black and other fillers [86], Nylon 6 inorganic [87], polyhydroxyether sulfone/poly(N-vinyl pyrrolidone) [88], graphite-based low-density polyethylene [89], caprolactone/Nafion blends [90], polybutylene terephthalate/polyamide [91], polyphenylene sulfide/acrylonitrile - butadiene - styrene [92], PMMA/polypyrrol [93], and lower or high performance liquid chromatography (LDPE/HDPE) [94]. 

The interfacial reaction of immiscible polymeric systems containing oxazoline and carboxylic acid groups, respectively, was studied by FTIR spectroscopy and FTIR microscopy. A poly(butadiene-co-acrylonitrile) rubber, where the nitrile groups are partially converted to oxazoline groups, was thermally annealed in a two-layer specimen with poly(ethylene-co-methacrylic acid). The formation of the esteramide in the interface was measured quantitatively by FTIR difference spectroscopy. 33 refs. 

Lennard and Margot (270) examined and compared traces of synthetic material from shoe soles by FTIR microspectrometry and packed-column PGC. Ding and Liu (271), in a similar analysis, examined 10 different rubber-soled shoes and 12 different automobile tires by Curie point PGC using two separate packed columns. They used varying ratios of butadiene-styrene, natural rubber, and butadiene-acrylonitrile to differentiate the samples. 

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