What are anti-degradants in rubber?

Anti-degradants are an important ingredient of rubber compounds. Anti-degradants are added to rubber compounds to protect the rubber from degradation due to oxygen and ozone. The anti-degradants reduce, but can not stop, the aging process in rubbery materials.

Are there other p-phenylenediamine anti-degradants in rubber components?

In pervious studies of tire samples, it was determined that other p-phenylenediamine (PPD) anti-degradants were also used in the formulation of rubber components for tires. A qualitative examination of the chromatograms was performed to determine if any other PPD anti-degradants were present.

Are there anti-degradants in tread rubber & sidewall rubber?

Anti-degradants were detected in tread rubber and sidewall rubber from every used tire that was analyzed. No apparent correlation was observed for the anti-degradants level and remaining tread depth and anti-degradant level and date of manufacture. The original concentration of anti-degradants in each of these tires was not known.

Can GC-MS be used to analyze polymer-bound anti-degradants?

The GC-MS method is well suited for the analysis of the oxidation products. Analysis of the polymer-bound anti-degradants will require careful devulcanization of the rubber so that nuclear magnetic resonance (NMR) spectroscopic analysis can be performed.

Can a surface swab provide a qualitative analysis of anti-degradant concentrations in rubber?

Anti-degradant concentrations in tread rubber as a function of remaining tread depth. The analysis has indicated that a surface swab of rubber samples can provide qualitative analysis of the anti-degradants levels.

What is the calibration curve for akrochem antiozonant PD-1 and PD-2 pellets?

A three-point calibration curve was prepared for Akrochem Antiozonant PD-1 Pellets (IPPD) and Akrochem Antiozonant PD-2 Pellets (6PPD). The concentration range covered by the calibration solutions was 0.5 μg/mL through 10 μg/mL. The calibration curve for both compounds showed excellent linearity (see Figures 2 and 3).