High-performance liquid chromatography rubber

Rubber industries produce various types of complicated products like tyre, cable, belt, seal, bearings, engine mounts, etc. The products are composed of rubber, plastics, fibre, metal, fillers and many other additives like antioxidants, accelerators, etc. Reverse engineering is a technique by which a rubber technologist can reconstruct the composition of the products based on thermal analysis. Dormagen [178] and Baranwal [179] reconstructed the formulation of a tyre, based on analyses of FTIR, spectra, thermal analysis and high performance liquid chromatography. 

Chromatographic Separation and Extraction with Foamed Plastics and Rubbers. G. J. Moody and J. D. R. Thomas Analytical Pyrolysis A Comprehensive Guide, William J. Irwin Liquid Chromatography Detectors, edited by Thomas M. Vickrey High-Performance Liquid Chromatography in Forensic Chemistry, edited by Ira S. Lurie and John D. Wittwer, Jr. 

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]. 

From these early studies, dithiocarbamates and their transition metal complexes soon found a host of applications. For example, as a result of their insoluble nature they are widely used in inorganic analysis (3,4). They can also be used to separate different metal ions by high-performance liquid chromatography (HPLC) (5-10) and capillary gas chromatography (GC) (11, 12), and find use as rubber vulcanization accelerators (13), fungicides (14), and pesticides (15). Concomitant with the development of these applications came a burgeoning interest in their general transition metal chemistry and the characteristics and properties of the complexes formed. 

Members Rept.49 Shawbury, 1980, pp.l2. 12ins. 2copies. 26/6/80. 91T HIGH PERFORMANCE LIQUID CHROMATOGRAPHY - ANALYTICAL APPLICATIONS IN THE RUBBER AND PLASTICS INDUSTRIES Sidwell J A... 

Guzman and co-workers [27] investigated whether it is possible to use waste tyre crumb as a replacement for zinc oxide as an activator in the sulfur vulcanisation of natural rubber (NR). They used the unsaturated organic compound squalene as a model compound for NR in their work, and followed the course of the vulcanisation reaction using the analytical technique high-performance liquid chromatography. The results confirmed that waste rubber crumb was an alternative to zinc oxide as an activator in the curing of NR compounds by sulfur-based cure systems. 

---