rubber antioxidant 6ppd(4020) chemical structure
rubber antioxidant 6ppd(4020) chemical structure
rubber antioxidant 6ppd(4020) chemical structure
rubber antioxidant 6ppd(4020) chemical structure
rubber antioxidant 6ppd(4020) chemical structure
6ppd - wikipedia

6PPD - Wikipedia

6PPD is prepared by reductive amination of methyl isobutyl ketone (which has six carbon atoms, hence the '6' in the name) with phenyl phenylenediamine (PPD). [3] This produces a racemic mixture. Application 6PPD is a common rubber antiozonant, with major application in vehicle tires.

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rubber antioxidants and their transformation products

Rubber Antioxidants and Their Transformation Products

Antioxidants are added to natural rubber (NR) and synthetic rubber (SR) during mastication, which is the process of transforming rubber from a strong and elastic state to a soft and plastic state [ 4, 5 ]. In addition, they could also be coated on the NR surface to achieve a similar effect [ 6 ].

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transformation products of tire rubber antioxidant 6ppd in

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 ...

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recent progress in the rubber antioxidants: a review

Recent progress in the rubber antioxidants: A review

While extensive efforts have been directed toward the research of rubber antioxidants, there are still several scientific and technological issues that remain unsolved, and the perspectives on the future trends of rubber antioxidants are highlighted. Graphical abstract Download : Download high-res image (276KB) Download : Download full-size image

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6ppd-quinone | us epa

6PPD-quinone | US EPA

Vehicle tires contain the chemical known as 6PPD to prevent tires from breaking down due to reactions with ozone and other reactive oxygen species in the air. When 6PPD reacts with ozone in the air, it forms 6PPD-quinone. Tires wear down through contact with roads, releasing particles into the environment.

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what we know: 6ppd and 6ppd-quinone

What We Know: 6PPD and 6PPD-quinone

Figure 2. 6PPD in tires is converted to 6PPD-quinone (6PPD-q) when exposed to ozone. 6PPD-q is contained in tire wear particles that can be transported in the air and potentially inhaled by people. The particles can also be deposited on surfaces, soils, and plants, including foods, leading to potential plant uptake and human dermal

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transformation products of tire rubber antioxidant 6ppd in

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.

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ijerph | free full-text | rubber antioxidants and their

IJERPH | Free Full-Text | Rubber Antioxidants and Their

Chemical antioxidants are generally classified as amine, phenolic, heterocyclic, phosphite, and nickel salts (nickel dibutyl dithiocarbamate (NBC)) antioxidants according to their chemical structure . During the rubber production, various antioxidants are often used as a mixture to improve performance and ensure an antiaging effect.

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rubber antioxidants and their transformation products

Rubber Antioxidants and Their Transformation Products

antioxidants are the main rubber antioxidants produced and used in China, of which 6PPD and 2,2,4-T rimethyl-1,2-dihydroquinoline (TMQ, RD) have the highest production, account- ing for more than ...

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new evidence of rubber-derived quinones in water, air,

New Evidence of Rubber-Derived Quinones in Water, Air,

In addition, a pair of characteristic fragment ions at m/z 215.0812 and 187.0863, suffering from a neutral loss of 28 Da, and a base peak with a low intensity at m/z 94.0650 indicated the existence of carbonyl and aniline groups in the molecular structure, which agreed well with the tandem mass spectrum of 6PPD-quinone determined by Tian et al ...

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