ABS回收料的多因素增韧改性研究

Multi-factor Toughening Modification Study of Acrylonitrile-Butadiene-Styrene Reclaimed Materials

废旧电器中丙烯腈-丁二烯-苯乙烯(ABS)壳体因环境老化,在回收利用时表现出极差的韧性,严重影响其循环使用。从工业应用角度出发,采用多组分协同增韧改性ABS回收料。通过正交试验设计和极差、方差分析,得到改性效果较佳的基础改性配方,进一步采用白油、无机填料和界面增容剂对基础配方进行优化,最终得到一种基于ABS高胶粉、纳米碳酸钙、硬脂酸、白油和硅烷偶联剂KH550的多因素增韧方案。结果表明,优化改性的ABS再生料相较于未改性废旧ABS,在成本提高20.5%,熔体质量流动速率降低9.4%以及拉伸强度降低26.6%的前提下,冲击强度和断裂伸长率分别提高了164.1%和39.2%,可有效满足ABS再生回收料在旅行箱基层板材、工具箱、充电器外壳等工业制品中的实际应用。

Acrylonitrile-butadiene-styrene(ABS)shells in waste electrical appliances exhibited extremely poor toughness due to the environmental aging,which seriously affected their cyclic utilization.From the perspective of industrial application,recycled ABS was modified by multi-component synergistic toughening.Through orthogonal experiment design and corresponding range and variance analysis,the fundamental recipe of recycled ABS with superior modification effect was obtained.The basic formulation was further optimized with white oil,inorganic filler and interfacial compatibilizer.And finally a kind of multi-factor toughening strategy based on high rubber content ABS,nano calcium carbonate,stearic acid,white oil and silane coupling agent KH-550 was obtained.Comparing with the unmodified waste ABS,the impact strength and elongation at break of the optimized ABS reworked materials has increased 164.1%and 39.2%,respectively.While its cost increases 20.5%,melt flow index decreases 9.4%,and tensile strength decreases 26.6%.As a consequence,the obtained recycling ABS with improved ductility can be effectively used in industrial products,such as,suitcase base,tool box,charger shell and other products.