Using chemical methods to depolymerize or convert plastic materials for recycling is a useful process to achieve a sustainable and circular plastic economy. Herein, different from conventional chemical methodologies to convert waste plastics into monomers or high value-added chemicals, a “waste polymer to precursor of polymer to new polymer” protocol was proposed. For the chemical recycling of poly(bisphenol A carbonate) (BPA-PC), a novel carbonate exchange strategy was explored, in which BPA-PC was depolymerized into “DPC-PC” via a diphenyl carbonate (DPC)-mediated carbonate exchange reaction. The unique structure of DPC-PC enables it to serve as a curing agent for preparing high-performance and recyclable epoxy thermosets, thus blazing a new trail for the chemical recycling of BPA-PC.

中文翻译：

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用于将聚（双酚 A 碳酸酯）化学回收为环氧固化剂的碳酸盐交换反应策略


使用化学方法解聚或转化塑料材料进行回收是实现可持续和循环塑料经济的有用过程。在此，与将废塑料转化为单体或高附加值化学品的传统化学方法不同，提出了一种“废聚合物-聚合物前体到新聚合物”的方案。对于聚双酚 A 碳酸酯 （BPA-PC） 的化学回收，探索了一种新的碳酸盐交换策略，其中 BPA-PC 通过碳酸二苯酯 （DPC） 介导的碳酸盐交换反应解聚成“DPC-PC”。DPC-PC 的独特结构使其能够用作制备高性能和可回收环氧树脂热固性塑料的固化剂，从而为 BPA-PC 的化学回收开辟了一条新道路。