為配合循環經濟，本研究以回收之低密度聚乙烯（RPE）為改質劑、
甲基丙烯酸縮水甘油酯（GMA）為官能化聚合物，添加至苯乙烯-丁二烯
-苯乙烯（SBS）改質瀝青，進行微觀型態觀察，並且分析工程性質。無
添加硫時，SBS 在瀝青中無交聯現象發生，形成顆粒狀結構分布於瀝青
中；添加RPE 會使SBS 的微觀結構更加分散，產生更微小的顆粒結構。
工程性質方面，添加RPE 使改質瀝青硬度提升、材料彈性恢復能力下降；
添加GMA 使RPE 微觀結構產生聚集現象，使RPE 在微觀下面積比例
提升，但RPE 之間並無交聯現象發生，工程性質方面亦可提升改質瀝青
硬度，但對彈性恢復能力和變形能力無顯著影響。多重應力潛變恢復
（MSCR）試驗下，RPE 用量提升時，改質瀝青於低應力下之抗永久變
形能力提升，但於高應力下其抗永久變形能力提升程度降低；GMA 用量
提升時，無法顯著改善材料彈性恢復能力和抗永久變形能力，但能降低材
料應力敏感性。本研究試驗之改質瀝青，其抗永久變形能力皆符合極高交
通量等級，但彈性恢復能力不足，建議酌量添加GMA，並需添加硫，改
善SBS 微觀型態，提升改質瀝青之工程性質。

In order to cooperate with the circular economy, this research added recycled low-density polyethylene (RPE) and glycidyl methacrylate (GMA) into styrene-butadiene-styrene (SBS) modified asphalt. Observe their morphology and discuss mechanical properties. SBS doesn’t cross-link without adding sulfer. SBS form a granular structure distributed in asphalt. Adding RPE makes the microstructure of SBS more dispersed. In terms of mechanical properties, the addition of RPE increase hardness and reduce elastic recovery property. The addition of GMA cause aggregation of the RPE microstructure and increase the proportion of RPE under the microscopic. But there is no cross-linking between RPE. In terms of mechanical properties, the addition of GMA improve hardness, but it has no significant effect on elastic recovery and deformation capabilities. Under the multiple stress creep recovery (MSCR) test, the permanent deformation resistance under low stress increases when the amount of RPE increases,. But the improvement of permanent deformation resistance decreases under high stress. When the amount of GMA increases, elastic recovery and permanent deformation resistance cannot be significantly improved. But the stress sensitivity can be reduced. In this research, modified asphalt meets requirement of resistance to permanent deformation, but fails in elastic requirement in E grade It is recommended to add GMA and sulfur to improve the microscopic appearance of SBS and enhance the mechanical properties.

Key words: Modified Asphalt, Microstructure, Recycled Low-density Polyethylene, Glycidyl Methacrylate, Multiple Stress Creep Recovery

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