Journal
POLYMER TESTING
Volume 96, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2021.107058
Keywords
Polypropylene recycling; Polyethylene fraction; Polyethylene polypropylene blend; DSC; FT-IR; NMR; Gel content
Funding
- EU commission, H2020 project PlastiCircle [730292]
- H2020 Societal Challenges Programme [730292] Funding Source: H2020 Societal Challenges Programme
Ask authors/readers for more resources
The presence of a polyethylene fraction in recycled polypropylene affects its processing and properties. Different methods were compared to determine the PE content, with consistent estimates achieved through DSC, NMR, FT-IR, and gel content measurements. Experimentation with various material grades was conducted to understand how they impact the results.
The presence of a polyethylene (PE) fraction in recycled polypropylene (PP) will influence the processing as well as mechanical and thermal properties of recycled polypropylene. The objective of this work has been to compare methods used to determine the fraction of PE in recycled PP, establishing calibration curves for each method. Plastics waste will be a mix of different grades - homopolymers and copolymers. It has therefore been tested how specific material grades affect the results. Characterization methods used were differential scanning calorimetry (DSC), FT-IR spectroscopy, NMR, and gel content measurement after peroxide extrusion. We have applied the derived calibration curves for two different post-consumer, recycled PP (rPP) in addition to a known 50/50 blend of PE and PP. DSC, NMR, FT-IR and gel content give quite consistent estimates of the PE content.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available