Temperature Dependent Pyrolytic Product Evolution Profile for Binary Mixtures of Low density polyethylene and Poly (ethylene terephthalate)
نویسندگان
چکیده
The present work aims at evaluating temperature dependency of product evolution from pyrolysis of binary mixtures of low density polyethylene (LDPE), and polyethylene terephthalate (PET). Product distribution studies have been reported for three different mixture compositions (20:80, 50:50, and 80:20) in the temperature range of 300-600oC, for a wide range of hydrocarbon products (C5-C44) and the same has been explained with mechanistic pathways of decomposition. The pyrograms have been analyzed in terms of mole fractions of different products evolved at various pyrolysis temperatures. Enhancement in the production of lighter fractions also support this observation. The following reaction types are considered to explain the degradation mechanism of the mixtures: (a) heterolytic cleavage of PET to generate acid ends and olefin ends; (b) homolytic cleavage of LDPE to generate free radicals; (b)attack of these free radicals on PET fragmented chain; (c) intramolecular and intermolecular hydrogen transfer to form volatile products, oligomers and regeneration of radicals, acidends or, olefin-ends.
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