Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, Uttarakhand 247667, India
: Received: 2 August 2016 / Approved: 9 August 2016 / Online: 9 August 2016 (14:22:43 CEST)
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Mishra, D. Thermal Analysis of Polyethylene Terephthalate (PET) –Coke Composites Prepared by Mechanical Alloying Technique. Preprints2016, 2016080099 (doi: 10.20944/preprints201608.0099.v1).
Mishra, D. Thermal Analysis of Polyethylene Terephthalate (PET) –Coke Composites Prepared by Mechanical Alloying Technique. Preprints 2016, 2016080099 (doi: 10.20944/preprints201608.0099.v1).
The thermal degradation behaviour of 10:90 and 90:10 blends of Polyethylene Terephthalate (PET) and petroleum coke has been investigated using mechanical alloying (milling) at 300 rpm and for periods up to 1-10 hours. Milled specimens were characterised using SEM and x-ray diffraction; their thermal degradation behaviour was investigated using thermo-gravimetric analyser (TGA) for temperatures up to 1200°C. Whereas PET specimens showed a tendency towards flattening out and increased surface area during collisions in ball mills, petroleum coke particles tended to break down into smaller particles. 10:90 and 90:10 blends of PET and coke showed significant microstructural evolution with increasing speeds and time including fracture, strain hardening and re-welding. X-ray diffraction results showed clear evidence for increasing amorphous component in petroleum coke without much influence on PET crystallinity. Thermo-gravimetric results showed a significant increase in the overall degradation and much higher weight losses associated with mechanical alloying. This study has shown that mechanical alloying could be used to modify the degradation behaviour of coke/plastic blends and corresponding yield during pyrolysis with implications for plastic waste management.