聚乙烯接枝马来酸酐含量对废旧聚乙烯改性沥青性能的影响  

Effect of maleic-anhydride-grafted polyethylene content on performance of recycled polyethylene-modified asphalt

作　　者：张文才 郝晓刚[1] 李萍[2] 林浩 裴强 丰功吉 付兆华 于小芳 ZHANG Wencai;HAO Xiaogang;LI Ping;LIN Hao;PEI Qiang;FENG Gongji;FU Zhaohua;YU Xiaofang(Taiyuan University of Technology,Taiyuan 030024,China;North university of China,Taiyuan 038507,China;Shanxi Transportation Technology Research&Development Co,Ltd,Taiyuan 030031,China)

机构地区：[1]太原理工大学,太原030024 [2]中北大学,太原038507 [3]山西省交通科技研发有限公司,太原030031

出　　处：《中国塑料》2022年第6期24-31,共8页China Plastics

基　　金：山西省应用基础研究计划(201901D211552);湖南省教育厅重点项目(20A094)。

摘　　要：首先采用双螺杆挤出造粒技术制备了一种由废旧聚乙烯(RPE)和不同含量(0%、1%、3%、5%、7%、9%,以RPE质量计)马来酸酐接枝聚乙烯(PE-g-MAH)组成的复合改性剂(CM),然后制备CM(4%沥青质量)改性沥青,并对常规指标(软化点、25℃针入度和25℃延度)、旋转黏度、红外光谱、高温存储稳定性(软化点差值、扫描电子显微镜微观形貌)以及流变性能等表征、分析。结果表明,CM改性剂中MAH与沥青中—OH之间发生化学反应,生成酯类物质,且随着PE-g-MAH含量的增加,CM改性沥青软化点、延度、黏度、高温存储稳定性、高温以及低温性能均显著提高,而针入度和相位角则降低;在温度变化较大的地区,可以考虑采用适量的PE-g-MAH制备CM改性沥青进行路面铺筑,并对于高温存储稳定性的改善进行了推理分析。A type of complex modifier(CM)comprising recycled polyethylene and maleic-anhydride-grafted polyethylene(PE-g-MAH)with concentrations of 0,1,3,5,7,and 9 wt % was prepared using a twin-screw extruder. The asphalt modified with 4 wt % CM was prepared,and its softening point,needle penetration,ductility,rotational viscosity,hightemperature storage stability,and rheological properties were investigated. The results indicated that the esters compounds were produced through the chemical reaction between the OH groups in asphalt and the MAH groups in CM.The softening point,ductility,viscosity,high-temperature storage stability,and high and low temperature performance were improved significantly with an increase in PE-g-MAH content. However,its needle penetration and phase angle decreased. Therefore,the CM-modified asphalt with a reasonable PE-g-MAH content can be considered as a good candidate for the asphalt pavement construction in regions,especially suitable for use in the zones with a significant change in temperature. In addition,the improvement of high-temperature storage stability was also analyzed.

关 键 词：沥青 废旧聚乙烯 聚乙烯接枝马来酸酐 含量 性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]