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Information Journal Paper

Title

KINETICS STUDY OF DEGRADATION AND STABILIZING EFFECT OF ORGANIC THERMAL STABILIZERS (EDTA, 1, 2 PROPANE DIOL, BENZOIC ACID AND PHENOL) FOR RIGID POLYVINYL CHLORIDE

Pages

  685-692

Abstract

 The KINETIC of the THERMAL DEGRADATION of rigid POLYVINYL CHLORIDE (PVC) under nitrogen atmosphere was studied by bromometry titration at various temperatures (160-190oC) in the presence of ethylene diamine tetra acetic acid (EDTA), 1,2 propane diol, benzoic acid, and phenol as thermal stabilizers. The rate of DEHYDROCHLORINATION at 1% degradation (RDH) and the time required for DEHYDROCHLORINATION to attain 1% conversion (tDH) were used to assess the effect of the additives on the thermal susceptibility of PVC. It was found that the values of the RDH were relatively lower and the tDH were considerably higher than the value obtained in the absence of the additives. The degradation rate coefficients were determined from the rate of dehydrochlorinating. The following rate expressions R=k[PVC]0.77[benzoic acid]-0.40, R=k[PVC]0.71[1,2 propane diol]-1.78, R=K[PVC]0.67[EDTA]-2.18, and R=k[PVC]0.88[phenol]-0.28 were obtained. The activation energies determined from the temperature dependence of the rate coefficients of the polymers degradation. The activation energies of the PVC degradation in the presence of EDTA, 1,2 propane diol, benzoic acid, phenol, and also in the absence of stabilizer were obtained 28, 27.5, 26.8, 26, and 24.5 kcalmol-1, respectively. The results show that the order of increasing stabilizing effect was EDTA >1,2 propane diol>benzoic acid> phenol. The results also, reveal greater stabilizing efficiencies of the investigated materials compared to non stabilizer.

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    APA: Copy

    TAGHI ZADEH, M.T., & FAKHIMI, F.. (2005). KINETICS STUDY OF DEGRADATION AND STABILIZING EFFECT OF ORGANIC THERMAL STABILIZERS (EDTA, 1, 2 PROPANE DIOL, BENZOIC ACID AND PHENOL) FOR RIGID POLYVINYL CHLORIDE. IRANIAN POLYMER JOURNAL (ENGLISH), 14(8 (62)), 685-692. SID. https://sid.ir/paper/529914/en

    Vancouver: Copy

    TAGHI ZADEH M.T., FAKHIMI F.. KINETICS STUDY OF DEGRADATION AND STABILIZING EFFECT OF ORGANIC THERMAL STABILIZERS (EDTA, 1, 2 PROPANE DIOL, BENZOIC ACID AND PHENOL) FOR RIGID POLYVINYL CHLORIDE. IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2005;14(8 (62)):685-692. Available from: https://sid.ir/paper/529914/en

    IEEE: Copy

    M.T. TAGHI ZADEH, and F. FAKHIMI, “KINETICS STUDY OF DEGRADATION AND STABILIZING EFFECT OF ORGANIC THERMAL STABILIZERS (EDTA, 1, 2 PROPANE DIOL, BENZOIC ACID AND PHENOL) FOR RIGID POLYVINYL CHLORIDE,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 14, no. 8 (62), pp. 685–692, 2005, [Online]. Available: https://sid.ir/paper/529914/en

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