Studying Synthesis of Modifier Based on Croton Aldehyde and Phthalimine and Sulfur Modified Bitumen BH 90/30

In this paper, the optimal conditions for synthesising a modifier with a new composition for bitumen modification were studied. For the synthesis of this modifier, the initial croton aldehyde was obtained from substances such as aldehyde and phthalimine in a 1:1 mol ratio, and the temperature was kept below 5⁰C. To determine the chemical structure of this synthesized compound, the chemical formula of the new structural modifier was proposed using modern methods such as IR-spectroscopy, NMR and PMR. First, this modifier interacted with sulfur, and then BN 90/30 brand bitumen was used to prepare modified bitumens. Different masses were mixed in a heat-resistant 1000 ml container at various mixing speeds and temperatures, specifically 135, 140, 145, and 160°C. According to the results obtained, the reaction yield of bitumen was modified at the optimal temperature of 160°C and a high 94.8%. Modified bitumen's composition and physicochemical and mechanical properties have been thoroughly studied using modern analytical methods. Infrared spectroscopy analysis methods determined its structure and composition. The surface morphology and element content were analyzed in tabular form using an MIRA 2 LMU scanning electron microscope. Heat resistance and destruction of modified bitumen were studied using thermogravimetric (TG) and differential thermal analysis (DTA) methods. Based on the results of this analysis, it is recommended that modified bitumen be used in asphalt roads, roofing and waterproofing materials.

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