کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1197290 1492967 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Conversion of poly(lactic acid) to lactide via microwave assisted pyrolysis
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Conversion of poly(lactic acid) to lactide via microwave assisted pyrolysis
چکیده انگلیسی


• Microwave assisted pyrolysis of poly(lactic acid).
• l-Lactide from pyrolysis of poly(lactic acid).
• Co-pyrolysis of poly(lactic acid) and tire.
• Acetic and propionic acid from pyrolysis of poly(lactic acid).

Microwave assisted pyrolysis (MAP) of poly(lactic acid) (PLA) was performed using different MW absorbers (tire, carbon, or Fe), apparatus set-up, and MW power, obtaining a liquid rich in 3,6-dimethyl-1,4-dioxan-2,5-dione (lactide) and other oxygenated organic compounds. Pure form of l-lactide was separated from the collected liquids while the meso-form of lactide was present in liquid and identified through GC–MS analysis. Up to 27.7% of lactide was formed and might be recovered. Furthermore simple acids such as acetic acid and propionic acid (up to 17.1%), carbonyl compounds, and fragments of PLA backbone randomly cleaved were present in liquids.The pyrolysis of PLA in the presence of other polymers, which might pyrolyze to aromatic compounds, such as those present in tires, gave cross reactions in the course of the pyrolysis affecting both yield and characteristics of liquid. Aromatic compounds formed from tire pyrolysis prevented the precipitation of lactide.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Analytical and Applied Pyrolysis - Volume 110, November 2014, Pages 55–65
نویسندگان
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