Polymer grafted aramid nanofiber reinforces immiscible waste polypropylene/poly(ethylene terephthalate)

Martey, Shawn; Traywick, Andrew; Kelly, Jesse C.; Sobkowicz, Margaret J.; Chen, Wan‐Ting

doi:10.1002/app.54534

Polymer grafted aramid nanofiber reinforces immiscible waste polypropylene/poly(ethylene terephthalate)

Journal Article · Mon Aug 14 00:00:00 EDT 2023 · Journal of Applied Polymer Science

DOI:https://doi.org/10.1002/app.54534· OSTI ID:2575845

Martey, Shawn ^[1]; Traywick, Andrew ^[2]; Kelly, Jesse C. ^[2]; Sobkowicz, Margaret J. ^[1]; ^[1]

Univ. of Massachusetts, Lowell, MA (United States)
Luna Labs USA, LLC, Charlottesville, VA (United States)

Polypropylene (PP) and poly(ethylene terephthalate) (PET) are plastics commonly used for packaging because of their excellent barrier and mechanical properties. The properties of these plastics are often diminished after mechanical recycling, inevitably causing down-cycling. Furthermore, this problem is exacerbated when different kinds of polymers mix. Aramid nanofibers have the potential to improve the mechanical properties of polymers due to their excellent mechanical properties but their poor dispersion in polymers is a challenge. Grafting polymers onto nanofibers can help address this challenge. In this work, different loading levels (1%, 2%, and 5%) of polymer grafted aramid nanofibers (ANFs) are blended with waste PP/PET (90/10), simulating a PP waste stream containing traces of PET contaminants. Scanning electronic microscopy, rheology, and differential scanning calorimetry results show the affinity of PP functionalized aramid nanofibers (PP_ANF) towards the PP matrix. At 1 wt% of the nanofiber, the size of the PET droplets in the PP matrix of the PP_ANF blend range from 0.2 to 2.0 μm while that of unmodified ANF and PET_ANF blends are in the range of 0.1–6.2 and 0.5–7.4 μm, respectively. In summary, polymer grafted ANFs have the tendency of improving properties of its like polymers due to similarity in the grafting polymer and the polymer matrix.

View Accepted Manuscript (DOE)

Research Organization:: Luna Innovations, Roanoke, VA (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Materials & Manufacturing Technologies Office (AMMTO); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO)

Grant/Contract Number:: SC0021790

OSTI ID:: 2575845

Alternate ID(s):: OSTI ID: 1995321

Journal Information:: Journal of Applied Polymer Science, Journal Name: Journal of Applied Polymer Science Journal Issue: 41 Vol. 140; ISSN 0021-8995; ISSN 1097-4628

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Polymer grafted aramid nanofiber reinforces immiscible waste polypropylene/poly(ethylene terephthalate)

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