Polymer modified bitumens, PMBs, are usually prepared at high temperature and subsequently stored for a period of time, also at high temperature. The stability of PMBs, in these conditions, has a decisive influence in order to obtain the adequate performances for practical applications. In this article the attention is focused in the analysis of the factors that determine the stability of styrene–butadiene–styrene copolymer (SBS)/sulfur modified bitumens when the mixtures are maintained at high temperature. Bitumens from different crude oil sources were used to prepare SBS/sulfur modified bitumens. Changes in the values of viscosity, softening point, as well as in the morphology of PMB samples, stored at 160 °C, were related to the bitumen chemical composition and to the amount of asphaltene micelles present in the neat bitumen used in their preparationududEl trabajo se centra en el estudio de la influencia de la estructura /composición del betún sobre la compatibilidad del sistema betún/SBS. Cuatro betunes provenientes de dos crudos distintos se seleccionaron y sus mezclas se utilizaron para preparar betunes modificados con contenidos de SBS del 3% en peso
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机译：聚合物改性的沥青，PMB，通常在高温下制备，随后也要在高温下保存一段时间。在这些条件下，PMB的稳定性具有决定性的影响，以便为实际应用获得足够的性能。在本文中，注意力集中在决定将混合物保持在高温下时决定苯乙烯-丁二烯-苯乙烯共聚物（SBS）/硫改性沥青稳定性的因素。来自不同原油来源的沥青用于制备SBS /硫改性的沥青。在160°C下储存的PMB样品的粘度，软化点以及形态的变化与沥青的化学组成以及制备中使用的纯沥青中存在的沥青质胶束的数量有关 ud udEl trabajo se centra en e estudio de la lafluencia de la estructura /composicióndelbetúnsobre la compatibilidad delbistúnbetúnbetún/ SBS。 Custro betunesproventes de dos crudos distintos se seleccionaron y sus mezclas se utilizaron para preparr betunes modificados con contenidos de SBS del 3％en peso
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