engleski

Development of polymeric pour point depressants based on 2-(diethylamino)ethyl methacrylate

To achieve the desired quality of diesel fuel the use of additives is necessary. They are added in small concentrations to improve the properties of diesel fuel. The main reasons for using additives are: increasing fuel stability during storage, improving flowability at low temperatures, improving fuel combustion, reducing emissions during combustion, ensuring wear protection and increasing fuel economy [1]. In our research, we develop additives for improvement of low-temperature properties. They are mainly binary or ternary copolymers such as ethylene vinyl acetate, methacrylate-based polymers, alpha-olefin copolymers and others. Their structure usually consists of a non-polar part (often a side chain) and a polar part (one or more polar groups). When the side chain is similar in length as paraffins in diesel, it provides nucleation sites and/or co-crystallization sites for the formation of paraffin crystals. The polar part has a strong influence on the growth of paraffin crystals by limiting their size and affecting their shape [2]. In this study, we synthesized polymeric methacrylate additives with functional 2-(diethylamino)ethyl methacrylate comonomers in their structure and investigated the influence of different amounts of the functional comonomer on the low-temperature properties of diesel fuel. The synthesized additives changed the crystallization behavior of diesel observed by differential scanning calorimetry (DSC) and optical microscopy with polarization. The standard ASTM D5950 pour point (PP) test showed a large improvement of more than 20 °C compared to non- additivated diesel.

Diesel ; Polymer additives ; Thermal properties

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