Identifying the roots of property variability in post-consumer recycled polypropylene feedstocks

) was introduced, providing an indirect yet sensitive method to quantify these hidden inconsistencies. Incorporating this metric alongside conventional MFR and Et% fully explains the observed mechanical differences, offering new insights into the fundamental origins of PCR-PP variability and establishing a practical methodology for more reliable feedstocks evaluation. These findings support improved recycling strategies and facilitate broader industrial application of recycled polypropylene.