Rheological characterization of styrene-butadiene-styrene copolymer modified bitumens
Rheological characterization of styrene-butadiene-styrene copolymer modified bitumens
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DOI：
10.1016/s0950-0618(96)00033-5
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发表时间：
1997-02-01
影响因子：
7.4
通讯作者：
Isacsson, U
中科院分区：
文献类型：
--
作者：
Lu, X;Isacsson, U
研究了苯乙烯-丁二烯-苯乙烯共聚物（SBS）改性沥青的流变性能。使用实验室混合器制备改性粘合剂。来自四个来源的五种沥青与不同聚合物含量水平的两种 SBS 聚合物混合。使用动态机械分析在较宽的温度和频率范围内表征改性粘合剂的流变性能。结果发现，SBS聚合物的添加增加了粘合剂在高温下的弹性并改善了粘合剂在低温下的柔韧性。 SBS改性还降低了沥青的温度敏感性；但是，不能使用单值参数来评估此属性。粘合剂流变学的改性程度随温度和频率而变化，并且取决于沥青来源/等级以及聚合物浓度和结构。 (C) 1997 爱思唯尔科学有限公司。
The rheological properties of styrene-butadiene-styrene copolymer (SBS) modified bitumens were studied. The modified binders were prepared using a laboratory mixer. Five types of bitumen from four sources were mixed with two SBS polymers at different polymer content levels. The rheological properties of the modified binders were characterized using dynamic mechanical analysis over wide ranges of temperatures and frequencies. It was found that the addition of the SBS polymers increased the binder elasticity at high temperatures and improved the binder flexibility at low temperatures. The temperature susceptibility of bitumens was also reduced by SBS modification; however, this property cannot be evaluated with a single-valued parameter. The degree of modification with respect to the binder rheology varied with temperature and frequency, and was dependent on the bitumen source/grade and the polymer concentration and structure. (C) 1997 Elsevier Science Ltd.