DSC study of antioxidant activity of selected p-phenylenediamines in styrene-butadiene rubber

• Published in: Journal of thermal analysis and calorimetry Vol. 97; no. 2; pp. 535 - 540
• Main Authors: CIBULKOVA, Zuzana, SIMON, P, LEHOCKY, P, KOSAR, K, CHOCHULOVA, A
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.08.2009; Springer
• Subjects: Analytical Chemistry; Antioxidants; Applied sciences; Calorimetry; Chemical reactions and properties; Chemistry; Chemistry and Materials Science; Degradation; Differential scanning calorimetry; Exact sciences and technology; Inorganic Chemistry; Mathematical analysis; Measurement Science and Instrumentation; Organic polymers; Physical Chemistry; Physicochemistry of polymers; Polyimide resins; Polymer Sciences; Rubber; Stabilization; Temperature dependence; protection factor; N,N′-substituted; antioxidants; DSC; induction periods; antioxidant effectiveness; oxidation; p-phenylenediamines; styrenebutadiene rubber; Differential scanning calorimetry; SBR; Thermooxidative degradation; Antioxidant; Induction period; Diamine; Oxidation; Thermal analysis; Rubber; Aromatic amine; N,N'-substituted
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-008-9628-4

The antioxidant activity of selected N,N′-substituted p -phenylenediamines (PPDs) in styrene-butadiene rubber (SBR) has been studied by differential scanning calorimetry under non-isothermal conditions. The kinetic parameters describing temperature dependence of induction period have been obtained. Protection factors and antioxidant effectiveness have been calculated to characterize the stabilizing effect of the antioxidants under study. It is shown that all antioxidants under study exhibit stabilizing effect on SBR. The obtained values were used to compare the stabilizing effect of the same antioxidants in polyisoprene (PI) rubber. The order of stability for SBR matrix samples differs from that for PI samples. It is shown that the stabilization effect of the antioxidant depends much on the polymer matrix.