Antioxidation activity of several diphosphonates in thermooxidative stability of LDPE

TLDR: In this article, the thermal degradation of low density polyethylene in the presence of several esters - diphosphonates compounds mostly used in anticancer treatment - was investigated by chemiluminescence at three temperatures: 180 °C, 190 °C and 200 °C.

Abstract: The thermal degradation of low density polyethylene in the presence of several esters - diphosphonates compounds mostly used in anticancer treatment - was investigated by chemiluminescence at three temperatures: 180 °C, 190 °C and 200 °C. Kinetic parameters that depict the stability of polymer - temporal characteristics (oxidation induction time, half - period of oxidation and maximum oxidation time), oxidation rates and activation energies - were calculated from the dependencies of chemiluminescence intensity on thermal degradation time. The stabilization effectiveness of the tested compounds and other antioxidants, namely SANDOSTAB P-EPQ and TOPANOL OC is presented for comparison. Experimental data have demonstrated that one of the diphosphonates compounds is more efficient than the commercial antioxidants.