Copolymers used as additives for fuels

New sources of clean and sustainable energy generation have been investigated in recent years, as there is a growing concern to reduce environmental pollution as well as to reduce greenhouse gas emissions that contribute to global warming. The copolymers with low molar mass (<Mw> 4000 g/mol) were herein synthesized through free radical polymerization of various acrylic compounds. The performance of them as additive showed that they can hinder the crystalline network formation, that occur on fuels in colder regions. For example, the use of M14A14 decrease the pour point (PP) of neat biodiesel (8100) to -9°C and blend 85 to -22 °C and the additive M14A16 decrease the PP of blend 820 to -35°C, corresponding to an excellent result, that allow the incorporation of a larger amount of biodiesel in diesel oil, composing blends of higher levels than the current values, independent of the country region and the season of the year. The feasibility of increasing the insertion of biodiesel in the 8razilian energy matrix, either by encouraging the use of 8100 or by increasing the biodiesel content in blends with diesel oil, results in the use of increasing amounts of biodiesel, which favors aggregation of value to the national raw materials, develops the national industry, expands the generation of employment and income in its production chain besides being a renewable energy source that favors the reduction of emissions of greenhouse gases.