PP-recyclate characterization after different sampling and recycling strategies-MFR

<p>PP-recyclates characterization after different sampling and recycling strategies &ndash; MFR data</p> <p>Authors: A. Mart&iacute;nez Garc&iacute;a, A. Ib&aacute;&ntilde;ez Garc&iacute;a, M.A. Le&oacute;n Cabezas<br>Innovative Materials and Manufacturing Area, AIJU, Avda. de la Industria, 23 03440 Ibi (Alicante), Spain&nbsp;<br>Contact Information<br>email: sunymartinez@aiju.es<br>tel: +34 965554475</p> <p>This dataset contains raw MFR data of PP-recyclates from different recycling strategies following different sampling strategies.</p> <p>The purpose of this analysis is to evaluate the efficiency of the different recycling strategies and the quality of the resulting recyclates in combination with other analysis techniques.</p> <p>Recycling strategies followed:&nbsp;</p> <p>1) Purification of PP-rich post-consumer waste using supercritical CO2 (scCO2). scCO2 does not alter particle size or shape.&nbsp;<br>The waste material was subjected to scCO2 treatment in two ways.&nbsp;<br>The first method involved directly treating the flake material, which was subsequently ground. These samples are labelled CO-PP03RE-SC01GR.&nbsp;<br>The second approach aimed to investigate whether cleaning efficiency depends on particle size.&nbsp;<br>The flakes were ground first, and scCO2 was then applied to the particles, resulting in a sample identified as CO-PP03RE-GRSC01.&nbsp;<br>Homogenous powder was obtained in both cases and five samples were analysed following the MFR. &nbsp;<br>For the sample preparation, the flakes of the waste were ground using a ring sieve mill (ZM 300, Retsch, Haan, Germany).&nbsp;</p> <p>Data from this approach are given in: PP recyclates after sc-CO2 recycling-MFR.xlsx</p> <p>&nbsp;<br>2) Purification of PP-rich post-consumer waste using solvent-based CreaSolv&reg; process, developed by Fraunhofer IVV.&nbsp;<br>The solvent-based recycling process results in more homogeneous recyclates by dissolving the entire sample, and selectively precipitating the desired purified polymer, with the potential of removal of unwanted components.&nbsp;<br>The waste material was subjected to solvent-based recycling treatment in two ways.&nbsp;<br>The first method includes additional purification with a solid-liquid separation step, referred to as CO-PP03RE-CS+SL.&nbsp;</p> <p>The second method is without this additional purification, labeled as CO-PP03RE-CS-SL.&nbsp;<br>Homogenous powder was obtained through solvent-based recycling process and five samples were analysed directly following the parallel plate rheology protocol.&nbsp;</p> <p>Data from this approach are given in: PP recyclates after solvent-based recycling-MFR.xlsx&nbsp;</p> <p><br>3) Purification of PP-rich post-consumer waste after upcycling and compounded by mechanical reprocessing.<br>The waste material was compounded after the reformulation with additives to enhance specific properties.<br>The material was subjected to compounding by means of remelting-restabilization, labeled as CO-PP03RE-CO.<br>Homogenous pellets were obtained through compounding recycling process.</p> <p>Data from this approach are given in: PP recyclates after upcycling-MFR.xlsx</p> <p><br>Reference samples:&nbsp;<br>PP-rich waste flakes were ground using a ring sieve mill to a particles size below 750 &micro;m. Five samples were analyzed.&nbsp;</p> <p>The nomenclature followed is presented in the Table below:</p> <p>Recyclate Nomenclature &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; Description<br>CO-PP03RE-GR&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;PP Recyclate after cryogenic grinding (reference material)<br>CO-PP03RE-CO (Brug) &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;PP Recyclate after compounding with Bruggolen&nbsp;<br>CO-PP03RE-GRSC01 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; PP Recyclate after cryogenic grinding and scCO2<br>CO-PP03RE-SC01GR &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; PP Recyclate after scCO2 and cryogenic grinding<br>CO-PP03RE-CR-SL&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; PP Recyclate after Creasolv without solid-liquid separation<br>CO-PP03RE-CR+SL&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;PP Recyclate after Creasolv with solid-liquid separation</p>