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Chemical recycling of crosslinked poly(methyl methacrylate) and characterization of polymers produced with the recycled monomer
Journal of Analytical and Applied Pyrolysis ( IF 6 ) Pub Date : 2018-06-01 , DOI: 10.1016/j.jaap.2018.03.017
Rayany Stôcco Braido , Luiz Eduardo Pizarro Borges , José Carlos Pinto

Abatract The chemical recycling of crosslinked poly(methyl methacrylate) wastes, PMMA, used as dental resins, was investigated for recovery and polymerization of the methyl methacrylate monomer, MMA. At temperatures of 400 °C in laboratory and pilot plant installations, PMMA could be depolymerized by pyrolysis to produce more than 90 wt% of liquid, containing more than 98 wt% of MMA. Gas chromatography (GC) and coupled gas chromatography – mass spectrometry (GC–MS) analyses were carried out to characterize the obtained liquid fraction. PMMA powders produced with different quantities of recycled MMA were prepared, after purification of the liquid through distillation, leading to polymer resins with properties that were similar to the ones obtained with virgin commercial MMA, as characterized by particle size, Fourier transform infrared (FT-IR), gel permeation chromatograph (GPC) and scanning electron microscopy (SEM) analyses.

中文翻译:

交联聚(甲基丙烯酸甲酯)的化学回收和用回收单体生产的聚合物的表征

Abatract 研究了用作牙科树脂的交联聚(甲基丙烯酸甲酯)废物 PMMA 的化学回收,以回收和聚合甲基丙烯酸甲酯单体 MMA。在实验室和中试装置中,在 400 °C 的温度下,PMMA 可以通过热解进行解聚,产生超过 90 wt% 的液体,其中含有超过 98 wt% 的 MMA。进行气相色谱 (GC) 和气相色谱-质谱联用 (GC-MS) 分析以表征获得的液体部分。用不同数量的回收 MMA 生产的 PMMA 粉末在液体通过蒸馏纯化后制备,导致聚合物树脂的性质与使用原始商业 MMA 获得的聚合物树脂相似,其特征在于粒度、傅里叶变换红外 (FT-红外),
更新日期:2018-06-01
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