Investigation of abiotic degradation of tire cryogrinds was written by Thomas, Jomin;Moosavian, Seyed Kasra;Cutright, Teresa;Pugh, Coleen;Soucek, Mark D.. And the article was included in Polymer Degradation and Stability in 2022.Related Products of 1843-21-6 This article mentions the following:
The abundance of microplastics found in the environment is a major cause of concern. Tire tread particles containing additives such as curing accelerators and antioxidants, can be a major source of elastomer pollution in the environment. Such tire particles combined with road pavement particles are referred to as tire and road wear particles, TRWP. The environmental availability from parent elastomers and the release of additives in the process of abiotic degradation were evaluated using freeze-thaw, wet-dry and accelerated UV-weathering experiments Acceleration factor determination tests were conducted to correlate UV-exposure to the natural aging in the environment. Freeze-thaw testing showed many additives such as di-Ph guanidine (DPG), benzothiazole sulfenamide (BTS) and para-phenylene diamine (6 PPD) as THF leachates and BTS transformation products. Further, UV exposure equivalent to 1.5 yr., 3 yr. and 5 yr. aging resulted in the formation a combination of ketones and carboxylic acids for styrene butadiene rubber (SBR), natural rubber (NR), and butadiene rubber-based tire cryogrinds. Attenuated total reflectance- Fourier- transform IR spectroscopy (ATR-FTIR) was used to detect the degradation of the elastomers on UV-exposure while gas chromatog.-mass spectroscopy (GC-MS) was used as a nontargeted, suspect screening anal. technique. The degradation intermediates and leachates identified using GC-MS represents useful data for the life cycle anal. of the functional polymers and additives and their possibility of environmental release. In the experiment, the researchers used many compounds, for example, N-Phenylbenzo[d]thiazol-2-amine (cas: 1843-21-6Related Products of 1843-21-6).
N-Phenylbenzo[d]thiazol-2-amine (cas: 1843-21-6) belongs to thiazole derivatives. The higher aromaticity of thiazole is due to delocalization of a lone pair of sulfur electrons across the ring, which is evidenced by chemical shifts of ring hydrogen at δ 7.27 and 8.77 ppm (C2 and C4), indicating diamagnetic ring current. Thiazole sulfonation occurs only under forcing conditions: the action of oleum at 250 °C for 3 hours in the presence of mercury(II) sulfate leads to 65% formation of 5-thiazole sulfonic acid.Related Products of 1843-21-6
Referemce:
Thiazole | C3H3NS – PubChem,
Thiazole | chemical compound | Britannica