废弃聚乙烯/废弃聚丙烯共混物功能化改性沥青混合料性能研究  

Study on properties of asphalt functionally modified with waste polyethylene/waste polypropylene blends

作　　者：张文才 郝晓刚[1] 裴强 亢小丽 ZHANG Wencai;HAO Xiaogang;PEI Qiang;KANG Xiaoli(College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Transportation Technology Research&Development Co,Ltd,Taiyuan 030031,China;Taiyuan Polymer Materials Research Center,Taiyuan 030024,China)

机构地区：[1]太原理工大学化学工程与技术学院,太原030024 [2]山西省交通科技研发有限公司,太原030031 [3]太原市高分子材料研究中心,太原030024

出　　处：《中国塑料》2023年第5期40-47,共8页China Plastics

摘　　要：通过双螺杆挤出分区加料技术制备三元共混改性剂(TBM),其中废弃聚乙烯/废弃聚丙烯/聚丙烯接枝马来酸酐(RPE/RPP/PP-g-MAH)质量比为6/4/0.7;以AC-20基质沥青混合料质量的0.4%添加TBM,研究了不同湿拌和时间、不同拌合温度对AC-20改性沥青混合料动稳定度影响,分析了不同拌合时间对TBM在改性沥青混合料中的形态变化的影响,比较了0、0.2%、0.3%、0.4%、0.5%TBM含量(以AC-20基质沥青混合料质量计)对AC-20改性沥青混合料高低温性的影响。结果表明,在干拌和工艺条件下,干拌和时间30 s,湿拌和时间不低于180 s且湿拌和温度为170℃时高温性能最佳,且TBM改性AC-20中其最佳含量为0.4%。In this paper,ternary blending modifier(TBM)made of the waste polyethylene(RPE)/waste polypropylene(RPP)/polypropylene grafted maleic anhydride blend with a mass ratio of 6/4/0.7 was prepared through twin-screw extrusion together with a zonal feeding technique.The effect of different mixing time and temperature on the dynamic stability of the modified AC-20-based asphalt was studied.The morphological evolution of TBM in the modified asphalt was analyzed with a variation of mixing time.The effect of TBM content on the high-temperature and low-temperature properties of the modified asphalt was compared at TBM contents of 0,0.2,0.3,0.4,and 0.5 wt%.The results indicated that under the conditions of a dry mixing time of 30 s,a wet mixing time of not less than 180 s,and a wet mixing temperature of 170℃,the optimum content of TBM for the modified asphalt was 0.4 wt%.This work provides a theoretical ba-sis for the applications of RPE and RPP blends in the modified asphalt.

关 键 词：废弃聚乙烯 废弃聚丙烯 共混物 改性沥青混合料 性能 

分 类 号：TQ320.79[化学工程—合成树脂塑料工业]