SEBS与接枝EVA复合改性沥青性能的研究与机理分析

Research and Mechanism Analysis on SEBS and Grafted EVA Composite Modified Asphalt

采用马来酸酐接枝乙烯-醋酸乙烯酯无规共聚物(MAH-g-EVA)与SEBS对沥青进行复合改性,测试改性沥青常规性能和相容性指标,并对复合改性沥青机理进行了初步探讨。实验结果表明MAH-g-EVA与SEBS复合改性沥青效果好于SEBS单独改性,各项性能均得到明显改善,并且两种改性剂与沥青发生反应形成强力的化学键,从而提升了体系相容性。

Asphalt is modified using maleic anhydride grafted EVA and SEBS. Its conventional performance and compatibility are studied and the composite modification mechanism is preliminary discussed. The results show that effects of MAH-g- EVA and SEBS composite modification are better than SEBS alone and the performances are significantly improved. Meanwhile, compatibility of the modification system is improved because the two modifiers produced strong chemical bonds with the asphalt.