Chin Mason T, Yang Tiangang, Quirion Kevin P, Lian Christina, Liu Peng, He Jie, Diao Tianning
Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States.
Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269, United States.
J Am Chem Soc. 2024 Mar 6;146(9):5786-5792. doi: 10.1021/jacs.3c13223. Epub 2024 Feb 21.
To mitigate pollution by plastic waste, it is paramount to develop polymers with efficient recyclability while retaining desirable physical properties. A recyclable poly(methyl methacrylate) (PMMA) is synthesized by incorporating a minimal amount of an α-methylstyrene (AMS) analogue into the polymer structure. This P(MMA--AMS) copolymer preserves the essential mechanical strength and optical clarity of PMMA, vital for its wide-ranging applications in various commercial and high-tech industries. Doping with AMS significantly enhances the thermal, catalyst-free depolymerization efficiency of PMMA, facilitating the recovery of methyl methacrylate (MMA) with high yield and purity at temperatures ranging from 150 to 210 °C, nearly 250 K lower than current industrial standards. Furthermore, the low recovery temperature permits the isolation of pure MMA from a mixture of assorted common plastics.
为了减轻塑料垃圾造成的污染，开发具有高效可回收性同时保留所需物理性能的聚合物至关重要。通过将少量α-甲基苯乙烯（AMS）类似物引入聚合物结构中，合成了一种可回收的聚甲基丙烯酸甲酯（PMMA）。这种聚（甲基丙烯酸甲酯-AMS）共聚物保留了PMMA的基本机械强度和光学清晰度，这对于其在各种商业和高科技行业中的广泛应用至关重要。掺杂AMS显著提高了PMMA的热解聚效率，无需催化剂，在150至210°C的温度范围内能够以高收率和纯度回收甲基丙烯酸甲酯（MMA），比当前工业标准低近250K。此外，较低的回收温度使得能够从各种常见塑料的混合物中分离出纯MMA。
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