iran chemical antioxidant ippd with high purity
iran chemical antioxidant ippd with high purity
iran chemical antioxidant ippd with high purity
iran chemical antioxidant ippd with high purity
iran chemical antioxidant ippd with high purity
  • Do substituted para phenylenediamine (PPD) antioxidants affect the environment?
  • 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.
  • Which PPD is most commonly used?
  • Among the various PPDs, N- (1,3-dimethylbutyl)-N’-phenyl- p -phenylenediamine (6PPD) and N-isopropyl-N’-phenyl-1,4-phenylenediamine (IPPD) are high-production-volume chemicals and the most frequently used . In 2020, China produced 200,000 tons of 6PPD, representing nearly 54% of the total production of rubber antioxidants .
  • Which compound has the highest antioxidant levels in Guangzhou & Taiyuan?
  • The same trend was also observed in its parent compound, 6PPD, which showed the highest proportion among these antioxidants in Guangzhou (46%), with a median level of 1820 pg/m 3, while that in Taiyuan was only 20%, with a median value of 81.0 pg/m 3 ( Table 1 ).
  • What is the most effective anti-oxidant?
  • Specifically, L-AP, L-AA, 3,5-DTBA, and DTT increased the recovery to over 60%, with L-AA demonstrating the most significant effect. L-AA is widely recognized as a low-cost and potent antioxidant that captures free radicals such as 1 O 2 , . Consequently, L-AA was selected as the protective agent.