回收废旧电池外壳聚丙烯的力学和耐热性能研究

社会经济的发展和生活水平的提高使得汽车保有量逐年增加,服役后报废汽车产生的废旧蓄电池也快速上升,报废的蓄电池给环境带来巨大压力。废旧电池外壳是聚丙烯,如何循环利用成为亟待解决问题。采用高抗冲共聚聚丙烯对其进行增韧改性,结果表明:当添加20%共聚聚丙烯后,缺口冲击强度提升39.2%,熔体流动速率降低了48.3%,在150℃进行热老化,300 h后表面没有明显变化,综合性能达到蓄电池专用料水平,同时为回收废旧蓄电池外壳聚丙烯材料的闭环回收提供了可行方案。

Study on mechanical and heat-resistant properties ofpolypropylene for recycled waste battery shell

With the development of social economy and the improvement of living standards,the number of cars has increased year by year,and the waste batteries produced by scrapped cars have also increased rapidly after service,which brings great pressure to the environment.The shell of waste battery is polypropylene,so how to recycle it becomes an urgent problem to be solved.In this paper,high impact copolymerized polypropylene was used to toughen it.The results showed that when 20%copolymerized polypropylene was added,the notch impact strength increased by 39.2%,and the melt flow rate decreased by 48.3%.After thermal aging at 150℃,the surface had no obvious change after 300 h,and the comprehensive properties reached the level of special materials for batteries.At the same time,it provided a feasible scheme for the closed-loop recycling of polypropylene materials for waste battery shells.