PDF(Pubmed)
Abstract：
Road dust cotains tire wear particles (TWPs) and a large amount of mineral particles (MPs). Given that tire tread in vehicles is mainly comprised of natural rubber (NR), isoprene and dipentene could be the main pyrogenic products stemmed from the thermolysis of NR. This offers a great chance to quantify the exact mass of TWP in road dust. As such, this study focused on the influence of MPs on the trends in thermolytic behaviors of NR using the resistive furnace (furnance) and Curie point pyrolyzers. This study confirmed that a reliable correlation in line with the formation of isoprene and dipentene could not be realized using the furnace type of a pyrolyzer. This means that employing the furnace type of a pyrolyzer in quantitification of TWPs could not be a viable and approproiate option due to the diverted thermolytic trends of NR due to differences in the heat transfer and adsoprtion of the pyrogenic products triggered by MPs. In the Curie point type of a pyrolyzer, the production rates of isoprene and dipentene were linearly responded to the mass of NR. The ferromagnetic substance in MPs could lead to the thermolytic trend change of NR. Thus, adopting the Curie point type of a pyrolyzer could be a viable option for quantification of TWPs in road dust when the effects of ferromagnetic substance are well neutralized.
摘要：
道路粉尘会引起轮胎磨损颗粒（TWP）和大量矿物颗粒（MP）。鉴于车辆的轮胎胎面主要由天然橡胶(NR)组成，异戊二烯和二戊烯可能是NR热解产生的主要热解产物。这为量化道路灰尘中TWP的确切质量提供了很好的机会。因此，这项研究的重点是MP对使用电阻炉（炉）和居里点热解器的NR的热解行为趋势的影响。这项研究证实，使用热解炉无法实现与异戊二烯和二戊烯形成一致的可靠相关性。这意味着在TWP的量化中采用热解炉类型不是可行和合适的选择，因为由于MP引发的热传递和热解产物的差异，NR的热解趋势发生了转移。在热解器的居里点类型中，异戊二烯和二戊烯的生产率与NR的质量呈线性响应。MP中的铁磁性物质可能导致NR的热解趋势变化。因此，当铁磁物质的作用被很好地中和时，采用居里点类型的热解器可能是量化道路灰尘中TWP的可行选择。
