Alternative, New Method for Predicting Polymer Waste Stream Contents


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In order to achieve the desired polymer recycling standards, precise estimations are needed about the composition of the polymer waste streams. The technologies that are currently used for this purpose, such as the infrared spectroscopy and the pyrolysis are neither time nor energy efficient as the processes may take up to hours, moreover the results are usually concluded by only analyzing small fractions of the waste streams. Meanwhile, as the polymer consumption of the world is increasing, the recycling and recovery rates demanded by numerous laws and restrictions are getting higher as well. The aim of this paper is to introduce a new technology that utilizes centrifugal force to separate the different polymer components of a sample in a melted state, containing the most common polymers found in a regular waste stream. After the separation, using the calculation method that is described, the exact ratio of the different materials can be given as well. In order to show the possibilities hidden in this technology, two samples, containing PA/PS/PP and PET/PA/PS/PP respectively, were separated and analyzed. The promising results were verified using optical microscopy as well as Raman spectroscopy.



Edited by:

T. Berecz, K. Májlinger, I.N. Orbulov and P.J. Szabó




K. Dobrovszky et al., "Alternative, New Method for Predicting Polymer Waste Stream Contents", Materials Science Forum, Vol. 812, pp. 247-252, 2015

Online since:

February 2015




[1] A.L. Andrady, Plastics and the Environment, John Wiley & Sons, New Jersey (USA), (2003).

[2] S. Pongstabodee, N. Kunachitpimol, S. Damronglerd, Combination of three-stage sink–float method and selective flotation technique for separation of mixed post-consumer plastic waste, Waste Manage. 28 (2008) 475-483.


[3] I. Vermeulen, J. Van Caneghem, C. Block, J. Baeyens, C. Vandecasteele, Automotive shredder residue (ASR): Reviewing its production from end-of-life vehicles (ELVs) and its recycling, energy or chemicals' valorisation, J. Hazard Mater. 190 (2011).


[4] M.S. Reddy, K. Kurose, T. Okuda, W. Nishijima, M. Okada, Selective recovery of PVC-free polymers from ASR polymers by ozonation and froth flotation, Resour. Conserv. Recy. 52 (2008) 941-946.


[5] B. Ruffino, S. Fiore, M.C. Zanetti, Strategies for the enhancement of automobile shredder residues (ASRs) recycling: Results and cost assessment, Waste Manage. 34 (2014) 148-155.


[6] F. Bezati, D. Froelich, V. Massardier, E. Maris, Addition of X-ray fluorescent tracers into polymers, new technology for automatic sorting of plastics: Proposal for selecting some relevant tracers, Resour. Conserv. Recy. 55 (2011), 1214-1221.


[7] B. Vajna, B. Bodzay, A. Toldy, I. Farkas, T. Igricz, Gy. Marosi, Analysis of car shredder polymer waste with Raman mapping and chemometrics, Express Polym. Lett. 6 (2012), 107-119.


[8] B. Bodzay, B.B. Marosfoi, T. Igricz, K. Bocz, Gy. Marosi, Polymer degradation studies using Laser pyrolysis-FTIR microanalysis, J. Anal. Appl. Pyrol. 85 (2009) 313-320.


[9] J. Beigbeder, D. Perrin, J-F. Mascaro, J-M. Lopez-Cuesta, Study of the physico-chemical properties of recycled polymers from waste electrical and electronic equipment (WEEE) sorted by high resolution near infrared devices, Resour. Conserv. Recy. 78 (2013).