Recycling mixed polyolefin plastics is a significant challenge due to the limitations in sorting and degraded mechanical properties of blends. Nonreactive compatibilization by adding a small amount of polymeric additive is a widespread approach to restoring the performance and value of recycled plastics. Over the past several decades, synthetic advances have enabled access to low-cost copolymers and precision architectures for deepening the understanding of compatibilization mechanisms in semicrystalline polyolefins. This review covers the design parameters of a polymeric compatibilizer, the testing of blends, the synthetic methods of producing economically viable additives, and surveys the literature of blends of compatibilized HDPE, LLDPE, LDPE, and iPP. From this, readers should gain a comprehension of the polymer mechanics, synthesis, and macromolecular engineering of processable polyolefin blends, along with the field’s future directions.

中文翻译：

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用于商品聚烯烃共混物的非反应性聚合物增容剂的进展


由于分类的限制和共混物机械性能的下降，回收混合聚烯烃塑料是一项重大挑战。通过添加少量聚合物添加剂进行非反应性增容是恢复再生塑料性能和价值的普遍方法。在过去的几十年里，合成技术的进步使得低成本共聚物和精密结构成为可能，从而加深了对半结晶聚烯烃相容机制的理解。本综述涵盖了聚合物增容剂的设计参数、共混物的测试、生产经济上可行的添加剂的合成方法，并调查了增容 HDPE、LLDPE、LDPE 和 iPP 共混物的文献。由此，读者应该了解可加工聚烯烃共混物的聚合物力学、合成和大分子工程，以及该领域的未来方向。