Application of calix[4]arene macrocycle to improve green strength in rubber compounds

Subject Areas :

fereshteh motiee ¹ , saeed Taghvaei-Ganjali ² , Henrik Margharian Pekachaki ³

1 - Assistant Prof. of Applied Chemistry, Chemistry Department, Islamic Azad University – Tehran North Branch, Tehran, Iran
2 - Professor of Organic Chemistry, Chemistry Department, Islamic Azad University – Tehran North Branch, Tehran, Iran.
3 - Ph.D student in Chemistry Department, Islamic Azad University – Tehran North Branch, Tehran, Iran.

Received: 2021-02-24 Accepted : 2021-02-24 Published : 2021-02-19

Keywords: rubber, Calix[4]arene, Green-strength, Bead, Ply,

Abstract :

In this research, the reinforcing effect of calix[4]arene macrocycle on the green strength in the rubber matrix is investigated for the first time. The calixarene derivative is mixed into raw rubber compounds before the vulcanization process. The bead and ply rubber compounds used in the motorcycle tire are selected for the tests. Due to the rawness of the rubber compounds and the absence of crosslinks to measure the green strength, elongation at break values of the raw compounds were considered as the indicator. Calixarene molecules can connect; this connection is through H-bonding between two calixarene moiety. These molecules pair each other two by two and make colonies. Paired calix molecules act as a bridge between rubber chains. Therefore, they reinforce the compounds and behavior similar to composites could be seen. Consequently, when they hold the chains, the green strength of the compounds increases.  

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