摘要
本文探索了采用力化学和热化学脱硫制备不同微观形态脱硫胶粉的可行性,并研究了对改性沥青性能影响。结果表明,两种手段均可制备不同微观形态的脱硫胶粉。由于脱硫机理不同,两种方式制备的脱硫胶粉微观形态不同。随着反应温度升高,脱硫胶粉的交联密度及硫含量降低、氧含量增加,溶胶含量及PDI增加、Mn降低。脱硫胶粉改性沥青的加工和易性增强、高温性能及弹性降低,储存稳定性先变弱后增强,力化学脱硫胶粉改性沥青的低温性能先降低后升高,热化学脱硫胶粉改性沥青的低温性能降低。随着胶粉粒径变细,热化学脱硫胶粉的交联密度及硫含量降低,氧含量增加,溶胶含量及PDI增加,Mn降低,力化学脱硫胶粉的相反;力化学脱硫胶粉改性沥青的高低温性能及弹性增强,热化学脱硫胶粉改性沥青的相反;两种脱硫胶粉改性沥青的储存稳定性增强。
This paper explores the feasibility of preparing different micro-structures of desulfurization waste rubber powder(WRP)by using mechanochemical and thermochemical,and its effect on the properties of modified asphalt.The results show that different micro-structures of desulfurization WRP can be prepared by the two methods.Due to the different desulfurization mechanism,the micro morphology of desulfurization WRP prepared by the two methods is different.With increasing reaction temperature,the crosslink density and sulfur content of desulfurization WRP decrease,and the oxygen content increases.The content and PDI of sol component in the desulfurization WRP increase,and the Mndecreases.With the reaction temperature increases,the processing workability of desulfurized WRP modified asphalt is enhanced with the reduced in its high-temperature performance and resilience.The storage stability of desulfurized WRP modified asphalt is weakened first and then enhanced.The low-temperature performance of mechanochemical desulfurized WRP modified asphalt is reduced first and then increased,while it is reduced for thermochemical desulfurized WRP modified asphalt.With the particle size of WRP decreases,the crosslink density and sulfur content of thermochemical desulfurized WRP decrease,and the oxygen content increases.The content and PDI of sol component increase,and the Mndecreases.It is reversed for mechanochemical desulfurized WRP.With the particle size of WRP decreases,the storage stability of desulfurization WRP modified asphalt was enhanced.The high and low temperature properties and resilience of mechanochemical desulfurized WRP modified asphalt are enhanced,while these are reversed for thermochemical desulfurized WRP modified asphalt.
作者
李纯
钱军
黄宏海
时敬涛
江宽
董大伟
梁智清
王晓凤
张立群
LI Chun;QIAN Jun;HUANG Hong-hai;SHI Jing-tao;JIANG Kuan;DONG Da-wei;LIANG Zhi-qing;WANG Xiao-feng;ZHANG Li-qun(Petro-China Fuel Oil Company Limited Research Institute,Beijing 100195,China;Beijing LudeYongtai Environmental Protection Technology Co.,Ltd,Beijing 101300,China;College of Materials Science and Engineering,Beijing Universityof Chemical Technology,Beijing 100029,China)
出处
《高分子通报》
CAS
CSCD
北大核心
2023年第2期213-223,共11页
Polymer Bulletin
关键词
力化学脱硫
热化学脱硫
脱硫胶粉
脱硫胶粉改性沥青
路用性能
Mechanochemical desulfurization
Thermochemical desulfurization
Desulfurization waste rubber powder
Desulfurization waste rubber powder modified asphalt
Pavement performance
