İsmet Kaya, Ali Bilici, Mehtap Şirin, Fatih Doğan

A Kinetic Evaluation for PANSA Doped Low Density Polyethylene Blends

In our previous study, we prepared blends of lowdensity polyethylene (LDPE) with semiconductorpolymer, poly (1-amino-2-hydroxynaphthalene-4-sulfonic acid) (PANSA), in different mixing ratios. Inthat study, the findings on some physical and chemical properties of the blends prepared were alsopresented. In this study, it was aimed to investigate the thermal decomposition kinetics of these preparedblends. For this purpose, thermograms of PANSA doped LDPE blends at four different heating rates wereobtained. With the addition of PANSA into LDPE, it was observed that the initial decompositiontemperature and maximum decomposition temperature of LDPE increased. Thermal decompositionkinetics of blends were performed using the integral isoconversional methods (Kissinger, Kim-Park (KP),Tang, Kissenger-Akahira-Sunose (KAS) and Flynn-Wall-Ozawa (FWO)) in addition to differentialisoconversional method (Friedman method). The activation energy values calculated by Kissinger, KP,Tang, KAS, FWO and Friedman methods and found to be 187.9, 200.2, 171.90, 171.78, 171.70 and171.89 kJ mol-1for 0.5 % PANSA doped LDPE, 193.9, 206.2, 173.31, 172.87, 172.98 and 172.78 kJmol-1for 1 % PANSA doped LDPE and 207.0, 219.2, 196.94, 197.09, 198.08 and 208.10 kJ mol-1for 0.5% PANSA doped LDPE, respectively. Thermal decomposition mechanism for blends was proposed withthe help of master plot curves.

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