Toy waste is an issue for municipal plastic recycling programs. In particular, toy waste typically is composed of different plastics and some metals. Separation of different parts of toy waste is necessary before recycling. In this study, a dissolution-precipitation process coupled with density separation was developed to extract acrylonitrile butadiene styrene (ABS) from toy waste using safer solvents and antisolvents. The polymer solubility of ABS was measured using Hansen solubility parameters, which were then used to down-select proper safer solvents and antisolvents. The acetone-water with a volumetric ratio of 3:1 was determined to be the most effective safer solvents and antisolvents for extracting 81 wt.% of ABS at room temperature. The recovered ABS has comparable mechanical behavior to the feedstock material with a similar glass transition temperature and molecular weight distribution. Compared to producing virgin ABS material, the dissolution-precipitation process reduces embodied energy by 58%.

玩具废物是市政塑料回收计划的一个问题。特别是，玩具废料通常由不同的塑料和一些金属组成。在回收之前，必须将玩具废物的不同部分分开。在这项研究中，开发了一种溶解沉淀工艺与密度分离相结合，使用更安全的溶剂和反溶剂从玩具废料中提取丙烯腈丁二烯苯乙烯（ABS）。使用汉森溶解度参数测量 ABS 的聚合物溶解度，然后使用该参数来选择合适的更安全的溶剂和反溶剂。体积比为 3:1 的丙酮-水被确定为在室温下萃取 81 wt.% ABS 的最有效、更安全的溶剂和反溶剂。回收的 ABS 具有与原料相当的机械性能，具有相似的玻璃化转变温度和分子量分布。与生产原始 ABS 材料相比，溶解-沉淀过程可减少 58% 的隐含能量。