Effect of multiple extrusions and influence of PP contamination on the thermal characteristics of bottle grade recycled PET

Itim, Bachir and Philip, Mathew (2015) Effect of multiple extrusions and influence of PP contamination on the thermal characteristics of bottle grade recycled PET. Polymer Degradation and Stability, 117. pp. 84-89. ISSN 0141-3910

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Abstract

The thermal characteristics of bottle grade recycled PET pellets contaminated with 5% PP prepared by multiple extrusions were studied by differential scanning calorimetry (DSC) at constant heating rate of 10 degrees C/min for various extrusion cycles. The peak temperature of crystallization Tc, the enthalpy of crystallization dHc and the degree of crystallinity Xc were found to be dependent on the number of extrusion cycles. From the dependence on extrusion cycles, the analysis of the crystallization mechanism by Avrami model has been determined, the Avrami exponent n and the rate constant Zt were calculated and the influence of the 5% PP on the bottle grade recycled PET matrix during multiple extrusions and its effect on crystallinity was thoroughly discussed.

Item Type: Article
Uncontrolled Keywords: Bottle grade recycled PET; PP contamination; Chain scission; Cross-linking; Crystallinity
Subjects: 600 Technology > 620 Engineering & allied operations
600 Technology > 660 Chemical engineering
600 Technology > 670 Manufacturing
Department: The CASS
Depositing User: Mathew Philip
Date Deposited: 20 Jan 2016 10:45
Last Modified: 20 Jan 2016 10:45
URI: http://repository.londonmet.ac.uk/id/eprint/860

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