ArticlePolymers2026
Life-Cycle Assessment of Laboratory-Scale Extrusion of Virgin and Recycled Polyolefins: Influence of Operating Duration on Life-Cycle Inventory Development.
Article in Polymers, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Life-cycle assessment (LCA) is widely used to evaluate the environmental performance of polymer processing and mechanical recycling systems, with its reliability fundamentally dependent on the quality and representativeness of the underlying life-cycle inventory (LCI) data. Laboratory-scale extrusion is extensively employed to generate inventory data for polymer processing, plastic waste mechanical recycling, and material development; however, the influence of operating duration on representative LCI development and the resulting environmental impact assessment has received little attention. Because startup energy represents a fixed contribution to each extrusion cycle, short-duration laboratory experiments may generate non-representative life-cycle inventories, leading to systematic overestimation of specific energy consumption (SEC) and associated environmental impacts. In this study, laboratory-scale co-rotating twin-screw extrusion of commercial virgin-grade and post-consumer high-density polyethylene (HDPE) and polypropylene (PP) was investigated to develop a runtime-dependent LCI framework. Extrusion trials at 1 and 3 h were experimentally implemented, while 8 and 24 h continuous-operation cases were developed as extrapolated runtime scenarios, which were subsequently evaluated using gate-to-gate LCA to quantify climate change (CC) and cumulative energy demand (CED) associated with extrusion electricity consumption. The measured melt flow index (MFI) ranged from 0.365 to 8.497 g 10 min
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