聚苯乙烯改性沥青高温性能研究  

Properties of Asphalt Modified by PS at High Temperature

作　　者：高光涛[1] 金海龙[2] 张隐西[2] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042 [2]上海交通大学高分子材料研究所,上海200240

出　　处：《中国塑料》2007年第7期52-55,共4页China Plastics

基　　金：国家自然科学基金资助(59973011)

摘　　要：通过反应共混技术制备了聚苯乙烯(PS)/苯乙烯-丁二烯-苯乙烯共聚物(SBS)改性沥青,研究了 PS 用量、反应剂硫磺(sulfur)对沥青高温贮存稳定性、黏度-温度特性和动态力学性能的影响。结果表明:通过反应共混改性所得到的改性沥青在高温贮存时,当 PS/SBS 不大于1/1时贮存样品上下层软化点差值小于2.5℃,贮存稳定性能得到了明显改善。对于沥青/PS/SBS/Sulfur 为100/3/3/0.15的体系,沥青的黏流活化能(E_η)从65kJ/mol 降低到了52.8kJ/mol;同时显著提高了沥青的高温复数模量和弹性,损耗角正切值(tanδ)在30～100℃范围内的变化小于10。The asphalt was modified using polystyrene （PS） and styrene-butadiene-styrene copolymer （8138） via reactive blending. The effect of the content of PS and sulfur on the storage stability of asphalt at high temperature, viscosity-temperature behavior, and dynamic mechanical property was studied. In presence of 8138 and sulfur, when the ratio of PS/SBS was less than 1/1, the difference of softening point between upper and lower layers was less than 2.5 ℃, indicating the storage stability of modified asphalt at high temperature was improved evidently. The active energy （Eη） of asphalt was reduced from 65 kJ/mol for neat one to 52.8 kJ/mol for the blend of asphalt/PS/SBS/sulfur（100/3/3/0.15）. The complex modulus and elasticity of asphalt at high temperature were also increased, and the change of tanδ was less than 10 within test temperature range of 30-100 ℃.

关 键 词：聚苯乙烯 改性沥青 动态力学性能 

分 类 号：TQ325.2[化学工程—合成树脂塑料工业]