Polymers are one of the most versatile materials because of their excellent cost to performance ratio and durability. These reasons have driven the extensive usage of polymers in many common applications, and often, their lifespan exceeds the needs of the application. This generates streams of polymer wastes which retain a substantial amount of their original properties and, therefore, could be recycled. Mechanical, chemical, and thermal recycling can be used for polymer recycling, although in the latter case, the polymeric component is lost by thermal degradation (energy recovery). This article reviews the recycling strategies which allow producing new polymeric materials from waste and the current research trends that could enable new opportunities for creating high-value polymeric products from what is now considered as waste.

聚合物由于具有出色的性价比，耐用性，因此是用途最广泛的材料之一。这些原因促使聚合物在许多普通应用中得到广泛使用，并且其寿命通常超过了应用的需求。这产生了聚合物废料流，这些废料流保留了其原始性能的大部分，因此可以回收利用。机械，化学和热循环可用于聚合物循环，尽管在后一种情况下，聚合物成分会因热降解（能量回收）而损失。本文回顾了允许从废物中生产新的聚合物材料的回收策略以及当前的研究趋势，这些趋势可能为从现在被视为废物的高价值聚合物产品中创造新的机会。