Synthesis and application of calix[4]arene phosphonato derivative as an effective dispersant of silica in silica-filled rubber compounds

Subject Areas :

Nasrin Hamrahjou ¹ , saeed taghvaei ² , Reza Zadmard ³

1 - Ph.D student in Organic Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran.
2 - Professor of Organic Chemistry, Faculty of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran.
3 - Professor of Organic Chemistry, Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran.

Received: 2021-11-17 Accepted : 2022-02-07 Published : 2023-05-22

Keywords: rubber, Silica, Dispersion, Calix[4]arene, Tire tread compound,

Abstract :

In this research, a special new processing aid agent based on calix[4]arene phosphonato derivative (CPD) was synthesized and its effect on silica dispersion within the rubber matrix was investigated. Initially, a reference compound and another compound containing CPD as a processing aid agent, based on SBR/BR and other ingredients were considered. After cure, mechanical tests including tensile strength and elongation at break and scanning electron microscopy (SEM) method were performed. Based on the results of tensile and rheology tests, no significant changes were observed in these properties. SEM images showed that the presence of CPD as a processing aid agent had a significant effect on improving the dispersion of silica in the rubber matrix compared to the reference compound. Therefore, by improving the dispersion of silica, the physical and mechanical properties of the tire tread compound containing CPD were improved and the performance of the tire increased.

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