reza zadmard Articles List

Open Access Article

1 - Synthesis and application of calix[4]arene phosphonato derivative as an effective dispersant of silica in silica-filled rubber compounds
Nasrin Hamrahjou saeed taghvaei Reza Zadmard

10.30495/jacr.2022.1945198.1988

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 More

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. Manuscript profile

Open Access Article

2 - Synthesis and Application Silica Supported Calix[4]arene Derivative for Reducing Heat Buildup in Tire Tread Compounds
Seyedeh Nazanin Sadat Mansouri saeed taghvaei Reza Zadmard

10.30495/jacr.2022.1945168.1987

20.1001.1.17359937.1401.16.2.11.5

In this research, a unique structure of silica-supported chlorosulfonyl calix[4]arene (SS-CSC[4]A) was synthesized and applied as a processing aid agent in tire tread formulation. A reference compound based on SBR/BR and other ingredients were considered. Then five othe More

In this research, a unique structure of silica-supported chlorosulfonyl calix[4]arene (SS-CSC[4]A) was synthesized and applied as a processing aid agent in tire tread formulation. A reference compound based on SBR/BR and other ingredients were considered. Then five other compounds were prepared in which resins C5, G90, SP1068, para-tert-Butylphenol, and the synthesized derivative of calix[4]arene were used as processing aid agents. Multiple characterization techniques such as elemental analysis, Fourier-transform infrared spectroscopy (FTIR), thermal gravimetric analysis (TGA), and 29Si CP/MAS spectroscopy were used to characterize SS-CSC[4]A structure. The classical rubber technology tests including rheological test, tensile test, and dynamic-mechanical-thermal analysis (DMTA) were done. DMTA results showed a great decrease in tan δ values of the compound containing SS-CSC[4]A at 90 °C compared to other compounds, which means that constructed tires with this unique structure of SS-CSC[4]A as processing aid agents will consume less fuel for lower heat build-up. Manuscript profile

Open Access Article

3 - Application of functionalized calixarenes as recepto
رضا زادمرد مهشید اسمعیل زاده رستمی بنفشه گرجی

Molecular recognition involves the association of molecular through non-covalent interactions such as vanderwaals force, hydrogen bounds, electrostatic interactions, and so on that often called host-guest interactions. Researchers are concerned about calixarenes with re More

Molecular recognition involves the association of molecular through non-covalent interactions such as vanderwaals force, hydrogen bounds, electrostatic interactions, and so on that often called host-guest interactions. Researchers are concerned about calixarenes with regards to having bowl-shaped molecules and their ability to performing molecular capsules. These capsules can be encapsulated biological guest molecules. In this review, examples of the organic-functionalized calixarenes on their upper or lower rims have been collected. In these reports, the functionalized calixarenes were used as ligand or receptor to recognize ions and biomacromolecules such as aminoacids, proteins, DNA, and NADH. The florescence spectroscopy method has been applied to study host-guest interactions due to its simplicity. Manuscript profile

Open Access Article