Улучшение термических характеристик пластифицированного ПВХ комплексом экологичных добавок

P. Kruchinina; I. Vikhareva

Authors

P. Kruchinina South Ural State University
I. Vikhareva South Ural State University

Keywords:

polyvinyl chloride, plasticizer, titanium phosphate, hierarchical structure, eco-friendliness, heat stability, adipate, stabilizer

Abstract

This study investigates the effect of the amount of diphenoxyethyl adipate (DPEA) on the thermal characteristics of plasticized polyvinyl chloride (PVC) modified with microstructured titanium phosphate having a microsphere morphology as a heat stabilizer. The choice of morphology is based on optimal structural characteristics, an elemental ratio of Ti:P = 0.86, and effective dispersion within the polymer matrix. A series of PVC compositions with varying amounts of DPEA were studied using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) in an oxidizing atmosphere. It was found that the sample with a DOP/DPEA ratio of 5/3 demonstrated the best thermal stability indicators: an initial thermal degradation temperature of 173°C, a minimum mass loss of 0.52% at 200°C, and an increased char residue of 5.16% at 581°C. The presence of aromatic fragments in the DPEA molecule contributes to enhanced thermal stability by forming a more stable polymer system. The results demonstrate the potential of using mixed plasticizers in combination with microstructured titanium phosphates to create environmentally friendly PVC compositions with improved thermal characteristics.

Author Biographies

P. Kruchinina, South Ural State University

аспирант кафедры «Экология и химическая технология»

I. Vikhareva, South Ural State University

кандидат химических наук, заместитель директора Научно-образовательного центра «Нанотехнологии»

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