Investigation of pressure-controlled injection molding on the mechanical properties and embodied energy of recycled high-density polyethylene

Krantz, Joshua; Nieduzak, Zarek; Kazmer, Elizabeth; Licata, Juliana; Ferki, Olivia; Gao, Peng; Sobkowicz, Margaret J.; Masato, Davide

doi:10.1016/j.susmat.2023.e00651

Investigation of pressure-controlled injection molding on the mechanical properties and embodied energy of recycled high-density polyethylene

Journal Article · Fri Jun 09 00:00:00 EDT 2023 · Sustainable Materials and Technologies

DOI:https://doi.org/10.1016/j.susmat.2023.e00651· OSTI ID:2418584

Krantz, Joshua ^[1]; Nieduzak, Zarek ^[2]; Kazmer, Elizabeth ^[2]; Licata, Juliana ^[2]; Ferki, Olivia ^[2]; Gao, Peng ^[2]; Sobkowicz, Margaret J. ^[2]; Masato, Davide ^[2]

Univ. of Massachusetts, Lowell, MA (United States); OSTI
Univ. of Massachusetts, Lowell, MA (United States)

Manufacturing with secondary feedstock has been identified as an effective strategy to improve plastic circularity. However, product quality inconsistencies arise due to variations in molecular weight, rheology, and mechanical properties. This work evaluates the processing of recycled high-density polyethylene using pressure-controlled injection molding with a focus on processing behavior and energy consumption. Further, the effects of injection velocity, packing pressure, and transfer position are benchmarked against a conventional velocity-controlled process. The experimental results show that the novel process control strategy significantly affects the mechanical properties, in-mold rheology, and energy consumption. Parts fabricated using pressure-controlled injection molding showed higher tensile properties due to increased macromolecular orientation. Additionally, reduced energy was used due to lower melt pressures required to completely replicate the cavity geometry. The results demonstrate the potential of the technology to support increased utilization of secondary feedstock and reduced carbon footprint.

View Accepted Manuscript (DOE)

Research Organization:: Sustainable Manufacturing Innovation Alliance Corp., West Henrietta, NY (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Manufacturing Office

Grant/Contract Number:: EE0007897

OSTI ID:: 2418584

Journal Information:: Sustainable Materials and Technologies, Journal Name: Sustainable Materials and Technologies Journal Issue: C Vol. 36; ISSN 2214-9937

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
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