Polycarbonate/acrylonitrile-butadiene-styrene blends (PC/ABS) has become one of the most common polymer insulation materials as packaging resin in electronics industry, due to its excellent mechanical, flame retardant and insulating properties. Once electronic products are eliminated and discarded, refractory PC/ABS will become a huge obstacle to e-waste recycling. Conventional solid waste treatment methods may lead to the release of toxic organobromine compounds and endocrine interferons, posing a threat to the environment and human health. In this study, supercritical water oxidation (SCWO) process was applied to decompose PC/ABS as e-waste packaging resin. The results showed that waste PC/ABS could be environmentally friendly and efficiently decomposed and debrominated during SCWO process. The decomposition mechanism could be proposed as depolymerization, generation of free radicals, conjugation of free radicals and carbonization. The debrominated products such as carbon materials, small molecular weight hydrocarbons, carbon dioxide and water were obtained and could be recycled as chemical feedstocks. The optimum SCWO parameters were temperature of 500 °C, holding time of 90 min, pressure of 23 MPa, and excess oxygen of 100%, respectively. The maximum weight loss rate and debromination rate of waste PC/ABS were 78.57% and 99.62%. Thus, the process developed in this study provided a green and sustainable approach for disposal of e-waste packaging resin.

聚碳酸酯/丙烯腈-丁二烯-苯乙烯共混物（PC / ABS）由于其出色的机械，阻燃和绝缘性能，已成为电子行业中最常见的聚合物绝缘材料之一，作为包装树脂。一旦电子产品被淘汰和丢弃，耐火的PC / ABS将成为电子废物回收的巨大障碍。传统的固体废物处理方法可能导致有毒有机溴化合物和内分泌干扰素的释放，对环境和人类健康构成威胁。在这项研究中，采用超临界水氧化（SCWO）工艺将PC / ABS分解为电子废物包装树脂。结果表明，废弃的PC / ABS可以对环境友好，并且在SCWO过程中可以有效地分解和脱溴。分解机理可以被提出为解聚，自由基的产生，自由基的结合和碳化。获得了脱溴产物，例如碳材料，小分子量碳氢化合物，二氧化碳和水，可以作为化学原料循环利用。最佳的SCWO参数分别为温度500°C，保持时间90分钟，压力23 MPa和过量氧气100％。废PC / ABS的最大失重率和脱溴率分别为78.57％和99.62％。因此，本研究开发的工艺为电子废物包装树脂的处置提供了一种绿色且可持续的方法。获得了二氧化碳和水，可以作为化学原料循环利用。最佳的SCWO参数分别为温度500°C，保持时间90分钟，压力23 MPa和过量氧气100％。废PC / ABS的最大失重率和脱溴率分别为78.57％和99.62％。因此，本研究开发的工艺为电子废物包装树脂的处置提供了一种绿色且可持续的方法。获得了二氧化碳和水，可以作为化学原料循环利用。最佳的SCWO参数分别为温度500°C，保持时间90分钟，压力23 MPa和过量氧气100％。废PC / ABS的最大失重率和脱溴率分别为78.57％和99.62％。因此，本研究开发的工艺为电子废物包装树脂的处置提供了一种绿色且可持续的方法。