Overuse of polymer products has led to severe environmental problems, which are threatening survival of creatures on earth. It is urgent to tackle enormous polymer wastes with proper cycling methods. Pyrolysis of polymers into high-value chemicals and fuels is displaying great potential to address the white pollution issue. In this study, we focus on chemical recycling of polystyrene, an important polymer in our everyday life, into valuable chemicals through simple pyrolysis strategy under nitrogen protection. It is found that yield of liquid product from polystyrene pyrolysis achieves as high as 76.24%, and there exists single component in the liquid product, which has been identified as styrene through hydrogen nuclear magnetic resonance spectra. Moreover, we propose monomer dissociation mechanism to explain the pyrolysis process of polystyrene based on the structure of polystyrene and experimental results.

中文翻译：

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将聚苯乙烯简单热解成有价值的化学品

聚合物产品的过度使用导致了严重的环境问题，威胁着地球上生物的生存。迫切需要通过适当的循环方法来处理大量的聚合物废物。将聚合物热解为高价值化学品和燃料在解决白色污染问题方面显示出巨大潜力。在这项研究中，我们专注于在氮气保护下通过简单的热解策略将聚苯乙烯（我们日常生活中的一种重要聚合物）化学回收成有价值的化学品。发现聚苯乙烯热解液体产物收率高达76.24%，液体产物中存在单一组分，经氢核磁共振谱鉴定为苯乙烯。而且，