High Molecular Weight Product Formation in Polyolefin Chemical Recycling: A Comprehensive Review on Primary and Secondary Products

sponsorship: J.V.W. acknowledges Catalisti and VLAIO via the WATCH project (HBC.2019.0001) and F.W.O.-Vlaanderen (G0B7218N); M.A. acknowledges VLAIO via the CAT4PS project (HBC.2021.0683); Z.Z. acknowledges Catalisti and VLAIO for the PolyAl project (HBC.2021.0752); T.V.V. acknowledges Catalisti and VLAIO for the PREFER project (HBC.2020.2609); and X.W. acknowledges F.W.O.-Vlaanderen (12S1822N) for financial support. (Catalisti via the WATCH project|HBC.2019.0001, VLAIO via the WATCH project|HBC.2019.0001, F.W.O.-Vlaanderen|G0B7218N, F.W.O.-Vlaanderen|12S1822N, VLAIO via the CAT4PS project|HBC.2021.0683, Catalisti|HBC.2021.0752, Catalisti|HBC.2020.2609, VLAIO|HBC.2021.0752, VLAIO|HBC.2020.2609)