a nation-wide study for the occurrence of 6ppd antioxidants and 6ppd
- Classification:Chemical Auxiliary Agent
- Purity:95.9%
- Type:Rubber chemicals
- Appearance:Purple brown to dark brown granules or flakes
- MOQ:1MT
- Application:tires,rubber shoes and other rubber products
- Storage:Dry and Cooling Place
- Package:1000kgs/ pallet with film
end-of-life tire decontamination from 6ppd and upcycling,abstract. n (1,3-dimethylbutyl)- n ′-phenyl- p-phenylenediamine (6ppd) is a ubiquitous rubber antioxidant and antiozonant that extends the lifetime of common rubber products, such as those.
the variation in concentrations of 6ppds and 6ppd-q are shown in fig. 1 and table s5. 6ppd antioxidant-q, dnpd, and 77pd were detected in all collected trunk road dust samples, and their concentrations were in the ranges of 0.740–626 ng/g, 3.00–349 ng/g, 1.
visão geral abrangente do 6ppd tipos de antioxidantes de.bem
o 6ppd e a 6ppd-quinona representam potenciais riscos ecológicos devido à sua persistência e potencial de bioacumulação. eles podem vazar para o meio ambiente através do desgaste dos pneus, levando à contaminação do solo e dos corpos d'água.
transformation products of tire rubber antioxidant 6ppd in,6ppd, a tire rubber antioxidant, poses substantial ecological risks because it can form a highly toxic quinone transformation product (tp), 6ppd-quinone (6ppdq), during exposure to gas-phase ozone. important data gaps exist regarding the structures, reaction mechanisms, and environmental occurrence of tps from 6ppd ozonation. to address these data gaps, gas-phase ozonation of 6ppd was.
tire-derived contaminants 6ppd and 6ppd-q: analysis, sample handling
rubber formulations are protected by antiozonants and antioxidants, which react with atmospheric ozone and oxygen to prevent brittleness and cracking (sustainable chemistry catalyst, 2023).since the 1960s, the anti-degradant, 6ppd (6-p-phenylenediamine; n-(1,3-dimethylbutyl)-n′-phenyl-p-phenylenediamine), has been used in tires to prevent catastrophic failures (sustainable chemistry catalyst.
preliminary research sheds light on proper analysis and sample handling,6ppd is an antioxidant added during the production of tires to prevent them from degrading and cracking when exposed to ozone in the atmosphere. this reaction protects the tire, ensuring driver safety, but also transforms 6ppd into the compound 6ppd-quinone.
tire-derived contaminants 6ppd and 6ppd-q: analysis, sample handling
publication year 2024 title tire-derived contaminants 6ppd and 6ppd-q: analysis, sample handling, and reconnaissance of united states stream exposures doi 10.1016/j.chemosphere.2024.142830 authors rachael f. lane, kelly smalling, paul m. bradley.
a review of n-(1,3-dimethylbutyl)-n′-phenyl-p-phenylenediamine (6ppd,1. introduction n-(1,3-dimethylbutyl)-n′-phenyl-p-phenylenediamine (6ppd) is an antiozonant and antioxidant which is predominantly used as an additive in synthetic rubber industries, especially in tire products. 6ppd is mainly added to tire preparation formulations at a mass ratio of 0.4–2% to prevent the bending cracking, thermal degradation, and ozone cracking of the rubber materials [].
occurrence of p-phenylenediamine antioxidants in human urine
general populations are widely exposed to various p-phenylenediamine antioxidants (ppds). n-(1,3-dimethylbutyl)-n′-phenyl-p-phenylenediamine (6ppd), a typical p-phenylenediamine antioxidant, has been detected in human urine samples.
beyond substituted p-phenylenediamine antioxidants: prevalence of,substituted para-phenylenediamine (ppd) antioxidants have been extensively used to retard oxidative degradation of tire rubber and were found to pervade multiple environmental compartments. however, there is a paucity of research on the environmental occurrences of their transformation products. in this study, we revealed the co-occurrence of six ppd-derived quinones (ppd-qs) along with eight.
- Does 6ppd-q affect SNA oxidation rate?
- A significant negative correlation was observed between 6PPD-Q and SNA. Moreover, there are also significant negative correlations between the 6PPD-Q and nitrogen oxidation rate, as well as sulfur oxidation ratio, illustrating the potentially competitive formation mechanism between SNA and 6PPD-Q.
- Is there a competitive mechanism between 6ppd-q and SNA?
- There might be a competitive mechanism between the formation of 6PPD-Q and SNA. The extensive utilization of rubber-related products can lead to a substantial release of p -phenylenediamine (PPD) antioxidants into the environment. In recent years, studies mainly focus on the pollution characteristics and health risks of PM 2.5 -bound PPDs.
- What are the data gaps in 6PPD ozonation?
- Important data gaps exist regarding the structures, reaction mechanisms, and environmental occurrence of TPs from 6PPD ozonation. To address these data gaps, gas-phase ozonation of 6PPD was conducted over 24–168 h and ozonation TPs were characterized using high-resolution mass spectrometry.
- Does 6ppdq occur during ozonation of 6qdi?
- Consistent with prior findings, 6PPDQ (C 18 H 22 N 2 O 2) was one of the major TPs in 6PPD ozonation (∼1 to 19% yield). Notably, 6PPDQ was not observed during ozonation of 6QDI ( N - (1,3-dimethylbutyl)- N ′-phenyl- p -quinonediimine), indicating that 6PPDQ formation does not proceed through 6QDI or associated 6QDI TPs.
